got a head question

[70mustangcoupe]

well i took the heads off the stang an im lookin for parts ro redo the whole thing

while lookin for rocker arms, yu can eiher get a 7/16 bolt or a 3/8 bolt so i went ot and measused what size i had and its 5/16. that size is only listed for mid 80's 302s and was wondering if i had diferent than stock heads on there
teres a number underneath the intake ports tahtsays D80E anybody know what year these heads are?

 

[68GEETEE]

D equals the 1970s decade, and 8 is the year in the decade. So you have 1978 heads.

http://www.mustangsandmore.com/ubb/FordTechData.html

or

http://www.ford-y-block.com/fordpartnumbers.htm

 

[68GEETEE]

I have a set of 1970 heads D0OE I am going to sell in the spring, they will need a rebuild. Let me know if they are of use to you.

 

[70mustangcoupe]

wheres the block number located so i can see if he block is a 78 too?

 

[302 coupe]

D8OE means you have 78 model heads. They have 69cc chambers, 1.78/1.45 valves. Around 78 or 79, ford switched the valvetrain setups around.

If your heads have press in studs and it sounds like they do, you'll have to have them fitted with screw in studs and guideplates, preferrably by a machine shop. You can choose either 3/8 or 7/16, doesn't really matter which, so long as they match the rockers.

If your heads have the pedesastal mount rockers, you'll have a bolt that screws into the head, along with stamped rockers, and an alignment plate that goes underneath it all. If this is the style you have, you can switch to a late model style bolt down roller rocker. I don't believe they require any modification to the head. The fulcrum has a square shaped extension on the bottom that fits into the head, this keeps rocker alignment, thereby eliminating the need for guidplates.

As for the block, you'll have to remove the starter, there is a casting# behind it that will give you the year.

 

[70mustangcoupe]

is there anyplace else? cause i dont really want to dive intothe engine any further cause im about to put it back together, now ther is an "80" on top of the block in betwee the ifters

and thanks so much for the information so far

 

[70mustangcoupe]

and also how do i find out what car those headscame off of, cause if i have a whole 78 engine then i have like 140 hp from astang and thats kina pissen me off

 

[68GEETEE]

the links I posted can tell you what car the parts were intended for on the assembly line.

 

[GaPonyFarm]

Engine casting number is on the block, just above the starter..

 

[D.Hearne]

It doesn't matter which vehicle it came from. The blocks on 302/5.0s are all basically the same, with minor variations. You can take any of them and build it into a screamer, just a matter of choosing the right parts. The heads are another matter. About the worst heads there were for a 302 were the D8OE heads. As far as rockers do as 302 coupe said, only if your going to go with a serious camshaft, have whatever head you choose, fitted with 7/16 rocker studs, the pedestal style are OK for milder cams, but they're weakest link is the 5/16 hold-down bolt. I've run the "Cobra" roller rockers with a B303 cam and turned it up to 6000 rpms without problems, but if you're gonna go higher on rpms or a larger cam, I wouldn't trust them to last.