heads!

Topic: heads! (Read 1630 times) previous topic - next topic

heads!

August 19, 2007, 06:04:30 PM

ok, heres the skinny. i have a set of E7's that i planned on porting. well today i went to do that at my uncles, and he thinks its not even worth my time. the ports are real small on these E7's, its got those little emmision holes inside that look very turbulant for exhaust gases, and the valves are real big. he said he still had those heads for that 351(idk if you all remember that thread, it was a long time ago). my question is, will '72 351w heads (from a wagon if that matters) bolt up to a 88 S.O. block and work with a H.O. cam? and will the 5.0 lower, pushrods, rockers, any of that jazz work with the new head? i do not know what heads they are excactly, it will be a day or two before i can get them and look at a casting number.

heads!

Reply #1 – August 19, 2007, 06:12:06 PM

yes, they will work. you will need ARP stepped head bolts or special bushings to use 302 head bolts, as 351 heads use 1/2" head bolts. and IIRC, those heads have the thermactor bumps also.

heads!

Reply #2 – August 19, 2007, 06:17:52 PM

All heads before '78 use stud rockers... Otherwise they'll work, but probably do not have hardened exhaust seats for unleaded gas...

You need to check the cc of the combustion chambers, '72 was the first year for Ford's emissions engines with low compression... The C9OE & D0OE 351 heads are the best, chambers are roughly 65cc( E7 size), unfortunately the exhaust port is still inexcusably small(dunno WTF Ford was thinking)... Those heads were used through '71...

Head bolts should make no difference, as the E7 was used on the truck 351, so those heads are already drilled for 1/2" head bolts... Late factory 5.0 bolts have a integral washer... The aftermarkets usually come with washers...

heads!

Reply #3 – August 19, 2007, 08:08:10 PM

im not sure of the year excactly, he said its about 72-ish, so it really could be any year.

if it is a 72-later low compression heads, are they still better then E7's? and if it is either a C9OE or D0OE heads, does that give me anymore options for cams or is a H.O. still the max with an S.O. bottomend? would the 72-laters give me anymore options also?

thanks a bunch,
keith

heads!

Reply #4 – August 19, 2007, 08:21:09 PM

Basically the GT40 Irons are a slightly revised early 351 head... Same combustion chamber and valve size but a bit better ports...

Anyway whatever applies to the GT40s, will apply to the 351 heads... I'll do a bit of digging to see if I have any info on the later smog heads...

heads!

Reply #5 – August 19, 2007, 08:40:57 PM

Quote from: TurboCoupe50;170390

Basically the GT40 Irons are a slightly revised early 351 head

wow, i didnt know that. that helps quite a bit cus im sure theres some old threads abouut gt40 heads, ill have to look into that. and thanks, i appritiate you looking up info on the smog heads.

keith

heads!

Reply #6 – August 19, 2007, 08:45:07 PM

I forgot to say the rocker arms(stud vs bolt down) on the GT40s are the major exception...

heads!

Reply #7 – August 20, 2007, 01:34:43 AM

I used to plug the thermactor holes when porting those early heads, and open the exhaust port up.
I'm not familiar with the E7s or any of the newer stock heads.
Be aware, there are the new style GT40 heads, and and older GT-40 head from the sixties that had 1.90 intake and 1.60 exhaust valves and screw-in studs and guide plates, kinda like a HiPo 289.
I have seen the older heads talked about in literature up until the late 80's.
TC50 is giving you good advice and info.

heads!

Reply #8 – August 20, 2007, 06:59:13 PM

ok, i thought there was a million threds asking whats the biggest cam u can run with SO pistons and gt-40 heads...but i cant find a single one! is a HO cam still the biggest i can go, or does this open up alot more choices for me?

heads!

Reply #9 – August 22, 2007, 12:26:27 AM

I'm not sure if GT-40(P) heads will work with SO pistons. With a stock HO cam I think it would still have interference problems. After all the intake valve in the GT-40(P) and the old 351W heads is a 1.84 valve. It might fit, but you'd have to clay it and find out.

heads!

Reply #10 – August 22, 2007, 07:14:01 PM

thats not what i wanted to hear, but it is what it is. i think ill get them tommorrow, so i'll get casting numbers and know excactly what type of heads they are. if theyre post 71(which i think they will be) are they still gt-40 style? or did they restyle them completely for 72?

heads!

Reply #11 – August 22, 2007, 09:36:58 PM

click on my diy link,,, there is a ton of info just for you on heads and casting numbers as well as cc ranges.

351*/ 69-74 / C90E-B,D,DOOE-C,G,DOOZ-C / 60.4CC / 1.84/1.54 HIGHEST HP IN 1969
351 / 75-77 / D5TE-EB / 60.4CC / 1.84/1.54 INTERNAL AIR INJECTION PORTS
351 / 78-80 / D8OE-AB / 69CC / 1.78/1.45 S/A 302 STAMPED ROCKERS
351 / 85-86 / E5AE-CA / 67-70CC / 1.78/1.46
351 / 87-95 / E7TE-PA / 62-65CC / 1.78/1.46

get your casting number and match up to above.
As for your deck clearance,, dont worry about the small stuff,, you can always put them on and check clearance minus the headgasket with playdough or clay. if need be, just work with the problem, the heads are good heads. The mustang guys are c00ching up all these early W heads for a reason!!

heads!

Reply #12 – September 12, 2007, 09:59:38 PM

awesome! i know this is an old thread, but i got sidetracked with everything going on and didnt get the heads till today. they're DO0E's, which im happy to hear after reading jcassity's post of these (and c9's) having the highest HP of stock 351 heads. it also sais 0E25 on the top near a valve spring, idk what this means, that just clarify its application? does 25 mean passenger wagon 351?