I need help with my 351w project's ventalation

MintyFresh

Member
Nov 2, 2019
12
6
13
41
Denver
Hi everyone,

I recently picked up a new project car for my son and I to tackle in the form of a 68 Mustang coupe with a 351w (stroked to 387). We've been doing a lot of preliminary maintenance to fix some of the glaring issues before we remove the engine and transmission for the restoration. We want it running before we tear it apart. We've named it "Frankenstang" because of the numerous "creative" (shall we say) decisions a previous owner made.

In particular, I found a pair of oddities I could use help with. On the passenger side valve cover, the vent hose makes its way back to the manifold. You'll see on top of the manifold, what I'm assuming is just a fitting for the vacuum port. There's a small section of hose coming out with a bolt threaded into it. Obviously the bolt is supposed to stop vacuum air flow from outside, but I'd like to know what the correct setup would be here. Otherwise, it seems like it'd make sense to install a fitting without the extra vacuum hose attachment, but I'm not sure. More importantly, it seems like a PCV valve should be somewhere inline. I could use thoughts on that.

Second, on the front of the carb are similar hacks. There's a wheel stud inserted into a short section of hose with the other end attached to the carb. Next to it there's a a Phillip's head bolt in a smaller section of tubing. Both are just dangling there. The cap on the driver's side valve cover is not vented. In any case, I could really use some help understanding what one of the previous owners was up to, and how the engine should be properly set up.

It does run, and seems to run well. But I want to get this set up right, and wheel studs and random bolts just isn't what I'm going for.

Thanks for the help on getting this set up right!



IMG_0954.JPG
IMG_0951.JPG
 
Last edited:
  • Sponsors(?)


Billm

Member
Apr 16, 2014
47
4
19
70
On a stock engine the pcv valve hose attaches to a carb plate under the carb, at the back of the carb. Your hose runs to the intake manifold which might cause a lean cylinder. Second it appears that you have an Edelbrock carb and intake manifold. The hose on the front of the carb that you are questioning is for a pcv hose! You could plug the hole in the back on the manifold and run a new pcv hose and attach it to the front port on the carb. Or find a rubber plug for the pcv hose on the front. The previous owner may have removed the carb pcv plate because the carb was to tall and had hood interference. Also it is sometimes hard to get a good seal between the carb and intake manifold. Pick up a good parts catalog from NPD, for your project (the paper one). I find it easier to naivigate than the online site. Edelbrock has online manuals for your carb. You and your son should have a lot of fun with your project. Any pictures of the car?
 

MintyFresh

Member
Nov 2, 2019
12
6
13
41
Denver
On a stock engine the pcv valve hose attaches to a carb plate under the carb, at the back of the carb. Your hose runs to the intake manifold which might cause a lean cylinder. Second it appears that you have an Edelbrock carb and intake manifold. The hose on the front of the carb that you are questioning is for a pcv hose! You could plug the hole in the back on the manifold and run a new pcv hose and attach it to the front port on the carb. Or find a rubber plug for the pcv hose on the front. The previous owner may have removed the carb pcv plate because the carb was to tall and had hood interference. Also it is sometimes hard to get a good seal between the carb and intake manifold. Pick up a good parts catalog from NPD, for your project (the paper one). I find it easier to naivigate than the online site. Edelbrock has online manuals for your carb. You and your son should have a lot of fun with your project. Any pictures of the car?
Funny - I came to a similar conclusion last night. I found that it's actually a Carter AFB 9636AS Performance carb, so basically the same as Edelbrock. I think the rebuild kits are almost identical. I fount yet another bold+hose hack under the air filter when I went looking for the carb's tag :rolleyes:. I've been traversing NPD and already had a bunch of sheet metal body parts I was about to order, so I'll add a few plugs and hoses to the order. I like the idea of routing to the front of the carb and capping off everything else. I might also consider possibly picking up a vented cap from Summit for the driver's side and running that hose over as well. In any case, thanks so much for the input. That's what I was looking for.

As for pictures, we picked it up in this state. It wasn't able to start without popping the clutch when we grabbed it. We've since got her up and running and we're working on getting the engine in good shape before we pull it for the restoration.
pony day.jpg
 
  • Like
Reactions: 2Blue2

2Blue2

will be trying this sex one when I can find it
Mar 5, 2019
2,288
1,381
133
53
Oahu
Your hose runs to the intake manifold which might cause a lean cylinder.

Having PVC run to one cylinder runner will cause that cylinder to ping.
run PVC to carb base plate or carb PVC location.
 

MintyFresh

Member
Nov 2, 2019
12
6
13
41
Denver
Having PVC run to one cylinder runner will cause that cylinder to ping.
run PVC to carb base plate or carb PVC location.
That's my plan. I've ordered a plug for the intake and a hose to re-plumb to the carb. What I can't for the life of me answer is why someone set it up this way. Based on some of the other mods, I think he wanted to make a drag car out of it, so maybe he wanted it running lean. Seems like an unusual choice. He wasn't inexperienced by any means; just creative. For example, there's a schrader valve he mounted in the trunk floor just behind the rear seats. It looks like he wanted easy access to his gas shocks. "Creative" is being kind.
 
  • Like
Reactions: 2Blue2

2Blue2

will be trying this sex one when I can find it
Mar 5, 2019
2,288
1,381
133
53
Oahu
For example, there's a schrader valve he mounted in the trunk floor just behind the rear seats. It looks like he wanted easy access to his gas shocks.

Ha Ha, I had a schrader valve filler in my trunk for air shocks for years after the air shocks were gone. It kept the hole plugged, right!?!
 

MintyFresh

Member
Nov 2, 2019
12
6
13
41
Denver
Ha Ha, I had a schrader valve filler in my trunk for air shocks for years after the air shocks were gone. It kept the hole plugged, right!?!
Turns out it fits really well as a plug. I might leave it as a memento, but welding it shut will be just as satisfying.
 
  • Like
Reactions: 2Blue2
Thread starter Similar threads Forum Replies Date
mustangpauly 351w swap need help will not idle Digital Self-tuning Forum 5
M I think I blew a hole in my timing cover 351w, help needed 1965 - 1973 Classic Mustangs -General/Talk- 2
D Need Help Headers 351w 1965 - 1973 Classic Mustangs -General/Talk- 1
1 99 Mustang.. 302-351 Swap Need Help 1996 - 2004 SN95 Mustang -General/Talk- 1
Justin R Fox Need Help With Stock 351w For 89 5.0 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 27
S 351W Set up. NEED HELP!!! Classic Mustang Specific Tech 5
chgovfk Building a 1971 351W -2v need more help..going to machine shop Classic Mustang Specific Tech 21
jruppert Need help in choosing cam for 351w 1994 - 1995 Specific Tech 23
T 351w efi to carb swap.....need some help Fox 5.0 Mustang Tech 10
cardude 351W transplant help needed Classic Mustang Specific Tech 12
TweekedGT Fox guys with 351W and longtubes..need help Fox 5.0 Mustang Tech 6
TweekedGT 351w Dart w/C6 in a 88 Coupe..need help Fox 5.0 Mustang Tech 4
M Need help with harmonic balancer for 351W Classic Mustang Specific Tech 3
M stroked 351W (408) header help needed please Classic Mustang Specific Tech 7
Mike86Stang 351W guys need some help with the clutch Fox 5.0 Mustang Tech 8
Hickfied 351W Waterpump and Serp. Help Needed! Fox 5.0 Mustang Tech 0
C Need help with 351w swap and flaming river install Fox 5.0 Mustang Tech 6
jnobles06 351w Guys, I Need Help! 1994 - 1995 Specific Tech 2
jnobles06 351w Guys I Need Help Fox 5.0 Mustang Tech 20
T_5.0_N'works 351w going in, need help on hood, mounts 1994 - 1995 Specific Tech 6
Z Help Need of A Good 351W Combo (NEWBIE) Fox 5.0 Mustang Tech 6
6 need help building up some 351w heads for my 289 Classic Mustang Specific Tech 5
T Need help identifying casting numbers 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
ameration Need Help with new 5.0 Purchase 1994 - 1995 Specific Tech 6
J Need help with qurterhorse and running Digital Self-tuning Forum 1
L Electrical Need Help Fox 5.0 Mustang Tech 15
B Need some help cars not right SN95 V6 Mustang Tech 1
T need help deciding on what cam i should get for my mexican block 302 Fox 5.0 Mustang Tech 8
A Engine 87 EFI 5.0 to my 83 four eye need help with wiring Fox Engine Swaparoo 0
R Need help finding reverse switch on transmission Fox 5.0 Mustang Tech 5
S CARWASH WASHOUT NEED HELP PLEASE 1996 - 2004 SN95 Mustang -General/Talk- 3
C Need help troubleshooting p1233 code. SN95 4.6L Mustang Tech 2
7991LXnSHO VW OBD2 help needed. Other Auto Tech 0
8 Engine Need help Fox 5.0 Mustang Tech 6
B Engine 1990 5.0L Fox high rpm cutout and loud backfire - Need Help Fox 5.0 Mustang Tech 11
silverlx50 Engine Bringing Charcoal Canister Back, Need Help Fox 5.0 Mustang Tech 4
A Drivetrain I Need Some Flywheel help/knowledge please Fox 5.0 Mustang Tech 7
B Need Help 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 2
YadiStang 1969 mustang. Need help with door lock actuator rod 1965 - 1973 Classic Mustangs -General/Talk- 0
D Brake issues I need help figuring out what part to order 2005 - 2009 Specific Tech 1
M I need help sourcing/repairing a fender 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
D Progress Thread 2003 mustang gt Rebuild 1996 - 2004 SN95 Mustang -General/Talk- 10
S Electrical Need help with unidentified wire connector on 4 cylinder LX 2.3L (N/A & Turbo) Tech 3
F I need some help SN95 4.6L Mustang Tech 1
W T5 rebuild - need help identifying parts Fox 5.0 Mustang Tech 12
Gman007 Need help with strut choice. SVT Tech Forum 8
markinms Engine Explorer Intake Swap Performance Issues - Need Help! Fox 5.0 Mustang Tech 10
S 2002 gt need help. 1996 - 2004 SN95 Mustang -General/Talk- 4
T Need help with throttle cable. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
T Engine Need help with 5.0 ho speed density build Fox 5.0 Mustang Tech 9
Similar threads