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post #1 of 8 (permalink) Old 01-29-2016, 08:18 AM Thread Starter
 
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Dumb Question of the Day

I recently purchased a 1966 YS 389 block. I want to eventually purchase a tri-power setup for it. Since it did not originally come with the tri-power setup, I just want to make sure this is feasible before I start collecting parts up.

Thanks for your time!
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post #2 of 8 (permalink) Old 01-29-2016, 09:10 AM
 
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All the Pontiac BLOCKS are externally similar (the cast-in engine mounts are different on some models). There are two versions of Pontiac HEADS: those with the run-of-the-mill "D" shape exhaust ports and those high-performance versions with the "O" shaped exhaust ports.

As long as your INTAKE MANIFOLD matches up with your HEADS you're okay. So, YES, there shouldn't be an issue putting a tri-power INTAKE on your engine.

"Honest Honey, it just kinda followed me home, can I keep it?"
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post #3 of 8 (permalink) Old 01-29-2016, 11:00 AM
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The only dumb question is the one not asked.
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post #4 of 8 (permalink) Old 01-29-2016, 12:31 PM
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Tiretread, there is NO difference between a '66 YS block and heads and a '66 WS block or YR tripower block and heads, except for the tripower intake bolted to them. Direct, factory fit, and guaranteed to make the car scream. Go for it! A '66 tripower unit will bolt onto any '65-'81 Pontiac engine except the 301.
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post #5 of 8 (permalink) Old 01-30-2016, 07:51 AM Thread Starter
 
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Thanks guys! I thought so but i've been accused of being a cut first, measure later, kind of guy and didn't want to go down the road with this build.
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post #6 of 8 (permalink) Old 01-31-2016, 06:57 AM
 
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the YS block just has the 4bbl. camshaft, that you will replace with an 068 or a different grind.
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post #7 of 8 (permalink) Old 02-04-2016, 07:02 PM
 
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What about those with the newer style 11 bolt timing cover without the dimple? Anybody running one of those with a tripower?

Johnny
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post #8 of 8 (permalink) Old 02-06-2016, 01:16 PM
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You would need to modify the T-stat housing for clearance.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance

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