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Old 06-10-2012, 09:00 PM
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buick 455 in a 87 cutlass supreme?

hi i have a 1987 cutlass supreme that has the stock buick 3.8 in it and i have a friend that is going to drop a buick 455 in it from an old 73 riviera, to anyone that has done this befor, is there anything major that has to be changed or customized?

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Old 06-11-2012, 11:17 PM
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What transmission? In stock form its not going to hold up very long with the 455 in front of it.
Make sure you get a larger radiator.

What do youpplan to use for exhaust, manifolds or headers
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Old 06-13-2012, 01:15 AM
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Quote:
Originally Posted by FmrStrtracer
What transmission? In stock form its not going to hold up very long with the 455 in front of it.
Make sure you get a larger radiator.

What do youpplan to use for exhaust, manifolds or headers


im going with manifolds and custom micky mouse duel exhaust and the mufflers will dump just befor the rear axel and im gonna try to use the rad from the rivera and i do have the riviera's th400 tranny to go with the buick 455
but ill have to use the stock v6 rear end, becuz i cant afford a new rear atm, i should get by fine aslong i dont hotrod it around and lay rubber all over
right?
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Old 06-13-2012, 12:09 PM
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Quote:
Originally Posted by theguesswho
im going with manifolds and custom micky mouse duel exhaust and the mufflers will dump just befor the rear axel and im gonna try to use the rad from the rivera and i do have the riviera's th400 tranny to go with the buick 455
but ill have to use the stock v6 rear end, becuz i cant afford a new rear atm, i should get by fine aslong i dont hotrod it around and lay rubber all over
right?
As long as you dont beat on it the axle will hold for a while, but eventually, even with upgrades, the 7.5 will eventually break.

U may have fitment issues near the A/C housing on the fire wall. Most use a die grinder to cut a section of the housing out, then use fibeglass to make a cupped patch that gives better clearence.
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