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As points of reference, a Hi-Po 289 was rated at 271hp, the Shelby version 306hp. SCCA Trans Am 302 Mustangs made around 500hp, but those were some pretty radical race-only engines.

I think you'd have a heck of a lot of fun just duplicating one of those 289s. I don't know if you'll ever get to "at least 450hp" even stroked. Or if a stock block can handle supercharging.

Maybe I'm way out in left field. Would be cool to hear from Ford guys here.
 

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As points of reference, a Hi-Po 289 was rated at 271hp, the Shelby version 306hp. SCCA Trans Am 302 Mustangs made around 500hp, but those were some pretty radical race-only engines.

I think you'd have a heck of a lot of fun just duplicating one of those 289s. I don't know if you'll ever get to "at least 450hp" even stroked. Or if a stock block can handle supercharging.

Maybe I'm way out in left field. Would be cool to hear from Ford guys here.
As points of reference, a Hi-Po 289 was rated at 271hp, the Shelby version 306hp. SCCA Trans Am 302 Mustangs made around 500hp, but those were some pretty radical race-only engines.

I think you'd have a heck of a lot of fun just duplicating one of those 289s. I don't know if you'll ever get to "at least 450hp" even stroked. Or if a stock block can handle supercharging.

Maybe I'm way out in left field. Would be cool to hear from Ford guys here.
The T500hp Trans Am 302 engine were Cleveland engines, different animal. I ran a stock dyno tuned 306hp GT 350 engine in both my '34 Ford and '65 Ranchero and from the 1/4 mi et/mph they were over rated. Probably closer to maybe 275.
 

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i mean whould i be better off just building the 302 in my f150 to begin with ?
If it is a factory roller cam block, then for sure it is smarter move than rebuild on old 289.

the only real difference between 289 and 302 is crank stroke, they both share the same 4.00" bore diameter..
289 is 2.87" stroke, 302 is 3.00" stroke.....the 302 is just a "factory " 289 stroker.
(I know somebody is going to mention connecting rod length....but it really doesn't matter as far as power)
 

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If it is a factory roller cam block, then for sure it is smarter move than rebuild on old 289.

the only real difference between 289 and 302 is crank stroke, they both share the same 4.00" bore diameter..
289 is 2.87" stroke, 302 is 3.00" stroke.....the 302 is just a "factory " 289 stroker.
(I know somebody is going to mention connecting rod length....but it really doesn't matter as far as power)
The 302 and 289 blocks are different. It has been a long time but my memory says you can't make a 302 out of a 289 without some lower cylinder clearancing for rod ends and I don't remember it being recommended.
 

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The 302 and 289 blocks are different. It has been a long time but my memory says you can't make a 302 out of a 289 without some lower cylinder clearancing for rod ends and I don't remember it being recommended.
Yeah, you are right, it's another of the little particularities of the 289 block.
Its actually the main bulkheads in the 289 block, won't clear the bigger counterweights on the longer stroke 302 crankshaft.
It takes a lot of hand grinder work, but it can be done.....not really worth it when 302 blocks are still plentiful. There isn't anything that makes the average non-HiPo 289 block a better place to start.
 
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