i know i have beaten this topic to death...but i have decided to go with a 351w head.....i spoke to an engine builder today and he said the 351w heads flow great for the price... i found heads for $35 each.... so which casting to get D6OE D7OE also..i am assuming that my hooker headers will bolt up..... and the engine builder said to get the smaller combustion chamber size....anyone have info to help me find which casting had which chamber?? these are the two castings that the junkyard has in stock... help me out and i will stop asking for heads help... thanks everyone
This is quoted from the "Ford Performance Book" published by S-A Design. "With pre-'77 351W heads you get 1.84 intake valves, 1.54 exhaust valves and 1/8" wider intake ports. However, combustion chambers are also larger, almost 10cc bigger". There are other numerous benefits and negatives on doing this swap. If you are set on doing this though look for the early pre-'77 Windsor heads with 59cc chambers. The post '77 heads will drop your compression ratio approx. one point. Other big things to consider are misaligned water passages and head bolts are a different size but can all be rectified. I would suggest that if you are doing this swap to p/u one of these books or find a complete article on it. In regards to the casting numbers, D6OE would be a '76 head and D7OE would be a '77 head with the '77 head being the larger cc's. I contemplated on doing this years ago but decided to port my 302 heads and put 1.94" / 1.6" valves in them instead.
With patience I found a set of Edelbrock RPM heads on EBAY for less than $800. I MAY have a set of early 289 heads for sale with the 1.94/1.60 valves. Someone has first dibs but if they decide not to take them I will let you know.
C90E (69) and DO0e's (70) are the one's most sought after of the 351w heads. they have 1.84/1.54 valves and 60cc chamber size. they are getting harder to come by. p.s. don't forget that you'll need to use the head bolt bushings for 351 heads on a 302.
ok i found a pair of c9oe..... they are 302 though ....they have a weird looking chamber.....kinda v shaped.......... they have a weird style rocker arms bolt thing....an allen head int he middle on the top of the bolt/stud and the rocker arms kinda look aluminum...not sure....but the guy said all heads are $35 a pair... we both agreed that someone has money on these heads ( i might get them) and i took a look at the D6OE and D7OE..351w heads.. they both have the same size chamber.. i am not sure what i am looking at and i have no way of knowing the chamber volume....i need some help on this so i can get the right ones at the same time i want to get some good flowing heads...i wish i had a friend nearby that was knowledgeable about these things... please help me make a good choice...
i fouund a web page that may be helpful to us all it has castings by year....so you can know wht to look for i guess http://www.mustangii.net/head.asp according to this page....C9OE is ONLY a 351w head....is that true>??
C9OE, D0OE 351w heads are the best bang for the buck...if you're stuck with factory castings. If you can't find those, a set of D5TE (going off of memory, sorry) 351w ('75 351w) heads work well too. Smallish chambers, also small valves, but larger valves go right in with no problems. That's what I used on my old Mustang...worked great. Most of the 351w up to '77 had larger intake ports than 302 and 289 heads had. Exhausts were basically the same from what I've seen (in other words, they all suck) but a little porting and they flow fairly decent. Most of the 302 castings are the same, except the E7TE's. They aren't too bad...about the same as the 70's 351w heads, but again, have small valves/small ports...but can be ported at home and get pretty decent results. I used a set of C9AE 302 heads for a long time. Switched to RPM heads, out of the box, and picked up 1 full second in ET and gained 10 MPH...no other changes. That outta tell you right there that the iron heads leave a little to be desired!
Windsors are a good head to use as stated. The 1/2 in bolt holes are no problem with bushing's installed for 7/16th's 302 bolts. Do not remember any water port problems on one of our truck engines, but there was some pushrod length issue on one fellows swap with aftermarket camshaft. Damn memory is going to he** in a hand basket. argh!
'75 up heads have small valves & bigger combustion chambers (65+cc), except the E7TE heads are small valve, but small (60cc) chambers. exhaust porting helps them all, as does a dual pattern cam which is bigger on the exhaust side.
so the C9OE heads are the favorable ones......is that C9OE 351w or C9OE 302 ? the chart i left earlier shows that a C9OE was only a 351w head....the head had 302 written on it....i forgot to check the casting inside the valve cover area for a 351 or 302 molding.... i will check it again..i want to go back to the yard tomorrow....and verify.. the C9OE heads....the chamber was shaped kinda like a V.....is this correct?
I think they made C9OE and D0OE heads in both 302 and 351. On the under side of the head on the rough cast surface between the pushrod holes is the engine size they were made for and the casting number.
The rocker arm nut with an allen set screw in the middle are poly lock nuts. The are designed to prevent the nut from backing off once the rockers are adjusted. It is possible that the heads have been machined for screw in studs. Did it have pushrod guide plates on them. If it has guide plates you will need hardened pushrods. http://store.summitracing.com/default.asp?target=egnsearch.asp&N=4294925232+4294859132+4294859077
i didnt see much to them....it was in a dark tractor trailer... but i could see a little bit...i was looking more for 351w heads and kinda cglanced at these... i am gonna go check them out in detail tomorrow.... for $35 a head...cant beat it if they are gold waiting to be discovered...
Not much gold in any factory windsor head, IMO. Hardened seats, new guides, screw in studs for a decent cam, hardened pushrods, porting, oversized valves, etc etc. Pretty soon you have $800 in a set of cast iron factory heads. You can find good used aftermarket heads for that. Also, the ports on aftermarket heads are just designed better. It's really hard to port a factory head to come even close without hitting water jackets. Just save your money for decent heads. Sometimes $35 is no deal.
