Vintage Mustang Forums banner

1 - 6 of 6 Posts

·
Gone but never forgetten
Joined
·
25,239 Posts
Discussion Starter #1
Ok, we've made the decision that my 289/C4 from my '66 will be transplanted to my son's '65. Then we'll take the new 289 block and build it with an AOD for my '66. The new 289 will have 351W heads on it.

My thought process here, is that I can build the 289 to match the 351W heads, therefore, not having to shave the covetted '69 351W heads and reducing their value and potention re-sale. So I'm thinking of building the block with 10:1 pistons, using the stock height of the 351W head, which would drop me back down to around stock compression at around 9.5:1.

I'm just double checking myself before taking the block to the machine shop. Any opinions? Am I on the right track? This block would have the Edelbrock Performer RPM cam/intake, my new true roller rockers (the rail type rollers would stay on the transplant to my son's). It would also retain my JBA shorties and March underdrive pullies.

If you always do what you've always done,
You'll always get what you've always got

http://www.classic-mustang.net/johnpro
 

·
Registered
Joined
·
10,587 Posts
Sounds good John....go for it....

Gonna do a little bowl blend and port match on the W heads? I'm guessing you'll have them in the shop anyway to have the seats put in and the rocker pedestals machined...

Don't be afraid to give them a minor shave to true up the deck surface and provide a nice finish for the gasket....

Pat
http://albums.photopoint.com/j/View?u=1570936&a=11937754&p=42910787.jpg
 
G

·
Guest
Joined
·
0 Posts
Its been a long time since it was done so I'm not exactly sure about these numbers
but; I had 30 taken from the block deck and 30 taken from the heads the pistons are
TRW flat top. I am at 10 to 1. The intake manifold bolt holes had to be massaged to fit.
they are now slightly oblong. Be sure to grind off the thermactor bump. be sure to match
the intake ports to your intake runners mine were very different before I fixed em.
do all the port work yourself its easy and fun,and noisy and time consuming.
jimbo

M.C.A.# 50000
http://albums.photopoint.com/j/View?u=1575692&a=11979479&p=43517165.jpg
 

·
Registered
Joined
·
20,861 Posts
John, If you don't want to ruin the 69 heads, look at any other 351 heads up to and including 76. Basically they're all pretty much the same. They all have the same valve sizes, same intake ports. About the only real difference is the newer heads have slightly larger combustion chambers and the imfamous bump in the otherwise same exhaust port.

With a cut to reduce chamber size and a little bowl work, the heads will be basically the same as the 69 heads. I have some articles on this and can e-mail them to you.

BTW, the 75 to 76 351W heads also have hardened seats to boot!

Tom
You can do anything you want to......ONCE!
aka "my 66 coupe"
http://albums.photopoint.com/j/View?u=1575517&a=11977890&p=44194856.jpg

Hale Boppe comet shot off my roof. See you can use 100 iso at night with no flash!
 

·
Registered
Joined
·
20,861 Posts
I bought a pair complete with valves, all oem, for $480.00 a pair. They flow well, modern combustion chambers and make decent power and best of all, ARE BRAND NEW! No old castings to fart around with and you can convert to roller rockers VERY EASY.

On the down side, you need to purchase a pair of MAC headers orTRY-Y's from Central Coast Mustang and you'll need a slight cut to reduce the 60 cc chambers down about 5 cc's to get the compression you want.

Tom
You can do anything you want to......ONCE!
aka "my 66 coupe"
http://albums.photopoint.com/j/View?u=1575517&a=11977890&p=44194856.jpg

Hale Boppe comet shot off my roof. See you can use 100 iso at night with no flash!
 

·
Gone but never forgetten
Joined
·
25,239 Posts
Discussion Starter #6
I picked up the Windsor heads with about 3k miles since a rebuild for about half that price ... kind of the reason for this swap to begin with /forums/images/icons/smile.gif They already have the screw in studs and guide plates, too. They really don't need anything but to bolt on and go!

If you always do what you've always done,
You'll always get what you've always got

http://www.classic-mustang.net/johnpro
 
1 - 6 of 6 Posts
Top