Progress Thread 289 Heads On 302 Block

[C-Los]

Just got ahold of what I thought was a 302 motor casting # E7TE. Turns out it has 289 heads. is this Good ? Bad? What do I look for to see it was done correctly. Is it just a simple swap bolt on with no adjustments or any type of changes?

Thanks ...

 

[C-Los]

tty

 

[tos]

They may have put the 289 heads on for higher compression due to the smaller chambers? looks like the rocker mounts are different.

"Head to Head" - Flow Testing Small Block Ford Cylinder Heads - AFR, Brodix, Canfield, Edelbrock, Trick Flow, GT40 - FordMuscle
here's a chart showing the differences.

 

[C-Los]

Here's what I have...is thi correct?

 

[C-Los]

Here is the block

 

[tos]

It looks like you are right, you have an 80's 302 block and 289 heads.
looks like the setup on the rockers is correct to me from what I can see. With that said I cant tell you all is correct cause we don't know what someone did with the rest of the engine? example = pistons.

 

[C-Los]

It looks like you are right, you have an 80's 302 block and 289 heads.
looks like the setup on the rockers is correct to me from what I can see. With that said I cant tell you all is correct cause we don't know what someone did with the rest of the engine? example = pistons.

Say the block is stock.... Will this set up not work?

 

[tos]

Well that's an 87 and later truck motor according to the code and I believe is a roller motor and I think 87 had flat top pistons where others used domed? So I don't think I can tell you much more givin the info you have. You might be able to use those heads but as a minimum you might want to go with thread in rocker studs. Those are pressed in.
Have you heard this run?
Somebody else will weigh in on this who's had more experience matching these im sure.

 

[a91what]

Go to junk yard and find an explorer pull the heads or the whole motor.

Gain 25hp minimum.

 

[C-Los]

Thanks guys !! Really appreciate your help!!