1976 mustang 5.0 swap

Elliotb520

New Member
Sep 24, 2019
3
0
1
20
Chicago
I’m going to be swapping a 5.0 from a 95 mustang GT with a Tremec T5 transmission into my 76 mustang II chassis. Has anyone ever done this swap, and is there anything I should know before I start? I’ll be making my own motor mounts and wiring harness, and I plan on making mounts so I can use the tremec bell housing as well, and I was going to get a custom driveshaft made to use the OE mustang II rear end. The car previously had the 2.8 V6 in it.
 
  • Sponsors(?)


74stang2togo

Oooh! CT!!!
Mod Dude
Mar 7, 2002
7,727
3,589
224
This is actually a very popular swap. I'm sure one of the guys that have done it will chime in.
 

extra_stout

Advanced Member
Aug 27, 2018
276
267
73
Germany
Yes, its doable. Its important that the transmission mounting surface sits 1 inch lower than the C4 mounting surface that you get your engine/tranmission angle right (best is to measure befor welding up the engine mounts; shoule be at 3° tranny down)
The 2.8 V6 was delivered either with a 8inch or the smaller axle. if you have an 8 inch, you can probably reuse the driveshaft (or shorten it). If you don't have the 8 inch rear axle you need also to swap the rear axle because the smaller one has not enough strength for the 302 v8.
You can check my thread. I swapped from a V6 to a 302 from a 2000 explorer with a 1996 mustang v6 T5 and with 95 v8 bellhousing (means same bellhousing/inputshaft length as your combo). I also build my own engine mounts based on the MII V6 mounts and some f150 ruber mounts and some steel profile in between... perhaps this helps.
 
  • Useful
Reactions: 74stang2togo

LILCBRA

I wish I didn't have all of these balls in the air
10 Year Member
Dec 6, 2005
2,094
1,135
164
48
Marietta, Ga
As long as you have the fabrication equipment, skills, and/or accessibility to someone who does, it won't be all that bad. I think @extra_stout has hit on most, if not all, of the major points. The only thing I can think of would be your oil pan. IIs use a specific front sump pan to allow for clearance over the crossmember AND to have the engine sit low enough for the hood. So keep in mind that you may have to modify your hood if you're not able to set the engine low enough. You may be in that boat anyway if you're planning on keeping the EFI, but I've seen those done too. About the only suggestion I have would be to see if you can't wire the EFI system from a Fox vs an SN95. From what I understand they're a tad bit easier to deal with for certain applications. I also think that the A9L/A9P ECUs are supposed to be the best options, especially over the SN95's ECUs. Just something to think about if you plan on keeping the EFI. If you're going to ditch it and run a carb you can disregard all of that. :)
 
  • Useful
Reactions: 74stang2togo

Elliotb520

New Member
Sep 24, 2019
3
0
1
20
Chicago
Thanks a lot, that should make the mounts a lot easier to make with your measurements. I was going to keep the EFI, it shouldn’t be too difficult, I’ve set up EFI systems before. And I was expecting to have to modify the hood, as the intake on the 302 is massive. How about power steering though? Will I be able to put the OE lines on the 5.0’s pump or am I better off just getting a manual rack?
 

LILCBRA

I wish I didn't have all of these balls in the air
10 Year Member
Dec 6, 2005
2,094
1,135
164
48
Marietta, Ga
I'd suspect you could have hoses made if the connections aren't correct, but steering with a manual rack isn't all bad either. I swapped a manual rack into mine years ago with the 302. You'll just have to keep in mind that the wider the tire you put on the front the more effort it'll take to turn the wheel the slower you're going. And most people run into a problem with the intermediate steering shaft when swapping. It's an easy remedy really, just cut the power intermediate shaft to length and weld the proper Borgeson joint onto it. It shouldn't be too big of a problem either way you go.....
 

extra_stout

Advanced Member
Aug 27, 2018
276
267
73
Germany
I have installed a power steering box from a fox body mustang (some minor mods neccesarry). Its part number ATSCO 64163.
Its much lighter (alu housing) and its also smaller, beside it will match the pressure of your power steering pump (there is a diffrence betwen MustangII and Fox) and it will have a more direct ratio. I put engine and transmission in with the old power steering box installed, and that was a thight fit with the 66 mustang oil pan I use (engine sits now 1 inch more towards nose and 1 inch higher). After installation of the new power steering rack there is much more room.
In this thread there are some thoughts about the intermediat shaft modification.
 

Decipha

Active Member
Aug 22, 2007
193
33
39
New Orleans, LA
www.efidynotuning.com
The newer the ecu the better. The 94-95 stang ecus are significantly better than the older fox ecu's. The only ones who say different have no experiences with them.

If your doing just a stock swap your best bet would be to find a donor explorer. It has the 8.8 rear end. 4r70w trans which you can either use or toss out. It comes with an obd-2 eec-v which is better than the eec-iv. And it has EDIS ignition on it which is significantly better than the older distributor ignitions.
 

Elliotb520

New Member
Sep 24, 2019
3
0
1
20
Chicago
Little update, I actually had the motor mounts made and in the car and I was lowering the motor in, only to find out that the oil pan is way too deep to clear the steering rack and the subframe. How can I get past this issue? I considered moving the motor forward to clear but then the trans would be mounted way too far forward, and if I raise the mounts then the trans will be way too high. Furthermore, the subframe can’t really be modified since it supports the front suspension. Is there a shallower oil pan available somewhere that I can install?
 

extra_stout

Advanced Member
Aug 27, 2018
276
267
73
Germany
I have installed a power steering box from a fox body mustang (some minor mods neccesarry). Its part number ATSCO 64163.
This helps you to get about 20mm of clearance.
If the T5 trany mounts in the same height as the stock C4 or 4-speed tranny crossmember, then the combo hasn't the right angle... this means the engine must move 1 inch up and the T5 can stay on the stock tranny crosmember height.

I considered moving the motor forward to clear but then the trans would be mounted way too far forward
The T5 shifter will be anyway more in front than the stock shifter cut out.

Perhaps you can make some pictures... with some measurments?!

By the way: which oilpan are you using?!
 

LILCBRA

I wish I didn't have all of these balls in the air
10 Year Member
Dec 6, 2005
2,094
1,135
164
48
Marietta, Ga
Without taking a hammer to your oil pan, you'll need to fine a II specific oil pan as I mentioned before. The shallow side was even more shallow than standard front sump pans allowing for clearance over the rack and pinion. That's your best bet. I'm not sure if there is another pan anywhere that works as well. And I don't believe anyone makes an aftermarket pan that fits either. @74stang2togo may know more about that than I do since I reused my original pan. I have tried a regular passenger car front sump and had it sit on the rack, so that much I can speak from experience.
 

74stang2togo

Oooh! CT!!!
Mod Dude
Mar 7, 2002
7,727
3,589
224
Without taking a hammer to your oil pan, you'll need to fine a II specific oil pan as I mentioned before. The shallow side was even more shallow than standard front sump pans allowing for clearance over the rack and pinion. That's your best bet. I'm not sure if there is another pan anywhere that works as well. And I don't believe anyone makes an aftermarket pan that fits either. @74stang2togo may know more about that than I do since I reused my original pan. I have tried a regular passenger car front sump and had it sit on the rack, so that much I can speak from experience.
Milodon's 8-qt front sump oil pan fits if you put some 3/4" spacers between the motor mounts and engine block. This will limit hood clearance with most intake manifolds, but a low-rise intake like an Edelbrock Performer 289 should work with a low-profile air cleaner.
 
Thread starter Similar threads Forum Replies Date
A 1976 Mustang rear end swap 1974 - 1978 Mustang II Talk & Tech 8
M Expired 1976-1978 Lincoln Versailes Disc Brake Rearend For Early Mustang Swap Drivetrain Parts 1
C 1976 mustang cobra 1974 - 1978 Mustang II Talk & Tech 19
Vincent 1976 Mustang II inside door marker lights 1974 - 1978 Mustang II Talk & Tech 1
O Engine Mustang Ii 76, 4 Cyl - Upgrade 1974 - 1978 Mustang II Talk & Tech 4
S For Sale 1976 Mustang Ii Ghia Mustang II Parts 1
S 1976 Mustang Ii Flexplate 1974 - 1978 Mustang II Talk & Tech 6
S I have a 4speed transmisson from a 1976 mustang 2 complete with shifter....not a toploader...$250 ob Drivetrain Parts 0
G 1976 Mustang 302-No wires on my coil so which ones 1974 - 1978 Mustang II Talk & Tech 3
C 1976 mustang cobra 2 heater core 1974 - 1978 Mustang II Talk & Tech 6
7 Wiring issues - 1976 Mustang II 1974 - 1978 Mustang II Talk & Tech 3
H FS: 1976 Ford Mustang Cobra II Engine and Power Adder 2
T 1976 Mustang II with late model 302 and many mods. Mustang II Parts 0
TwoStangWmn 1976 Mustang 11 coupe 1974 - 1978 Mustang II Talk & Tech 3
ryan218 1976 ford mustang cobra II for sale ( ohio ) Mustang II Parts 19
jnobles06 1976 mustang cobra 2? Classic Mustang Specific Tech 7
Nickybull 1976 ii 1974 - 1978 Mustang II Talk & Tech 4
T Looking for 1976 parts suppliers 1974 - 1978 Mustang II Talk & Tech 5
7 1976 Cobra build 1974 - 1978 Mustang II Talk & Tech 36
7 For Sale 1976 cobra Floor/Sub Frame Mustang II Parts 1
V For Sale 75/76 assortment of parts for sale Mustang II Parts 10
M 1976 2+2 restoration The Welcome Wagon 2
Buddha_DUT Missing Blue And White 76 Coupe 1974 - 1978 Mustang II Talk & Tech 4
kenny93 1976 Cobra Ii Build Thread By Kenny Stclair 1974 - 1978 Mustang II Talk & Tech 39
S For Sale 1976 Cobra... Great Parts Car/ Project Mustang II Parts 4
C Expired 1976 Cobra Project Abilene, Tx $1000 Classic Mustangs For Sale 1
D Searching For 1976 Cobra Parts Other Classifieds 0
T 1976 COBRAll FOR SALE 1974 - 1978 Mustang II Talk & Tech 0
R 1976 cobra factory racecar??? 1974 - 1978 Mustang II Talk & Tech 4
R 1976 cobra factory racecar??? Mustang II Parts 2
B 1976 Cobra II 1974 - 1978 Mustang II Talk & Tech 4
T Vacuum schematic for a 1976 2.3 1974 - 1978 Mustang II Talk & Tech 3
Donny Did all 1976 Cobra II's come with T-Tops??? 1974 - 1978 Mustang II Talk & Tech 2
P 1976 COBRA II V8 1974 - 1978 Mustang II Talk & Tech 16
9 1976 302 HO 140HP????? Fox 5.0 Mustang Tech 8
M Not sure where to ask -HELP - Electrical Issues with 2005 mustang, was headlights and now wipers also random radio coming on without keys 2005 - 2014 Specific V6 Tech 3
A WTB/Trade Stock Mustang 5.0 cam wanted Engine and Power Adder 0
N Mustang tumbler gets stuck in certain positions SN95 4.6L Mustang Tech 1
G flexplate needed for a 1978 mustang ii (5L V8) 1974 - 1978 Mustang II Talk & Tech 1
W Electrical Convertible Top Switch spade connectors pulled loose (92 Mustang LX Conv.) Fox 5.0 Mustang Tech 3
0 4.6 2v SOHC 2k rpm Idle, help reading engine data SN95 4.6L Mustang Tech 0
H Adding Factory Look Air Conditioning to 70 Without It 1965 - 1973 Classic Mustangs -General/Talk- 1
S 1993 Mustang 2.3 L Automatic A4LD Transmission - Help 2.3L (N/A & Turbo) Tech 2
W Mach1 2003 coolant leaking rear of engine SN95 4.6L Mustang Tech 1
G For Sale 91 Mustang LX hatchback 5.0, 5 speed, $5,300. Fox Body Mustangs For Sale (1979-93) 0
S New here! The Welcome Wagon 5
B Engine 86 Mustang GT 5.0 V8 Start Up RPM Fox 5.0 Mustang Tech 0
7991LXnSHO How do you spell Mustang in Russian? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
T Hello Mustang Lovers! Long time reader, first time member. I have a 1967 Mustang coupe with a 200 CID engine. The Welcome Wagon 0
B Leather Seats for My Car The Welcome Wagon 0
Similar threads