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Old 07-03-2014, 12:03 AM
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Buick 455 with T350

So I am building a 455 Buick that will be fairly mild, .030 over to clean up the cylinders, stock hyperutectic dish pistons. Heads miled and mild port job/near stock compression of 8.4:1. compcams 268, and a few oiling mods for reliability, stock stage 1 intake with a carter AFB 625.
I have a few BOP turbo 350's and also two Chevy bolt pattern turbo 400's that iI I could use with an adapter plate . Will a mild rebuilt T350 hold up to the torque of the buick. It's going in a street car. Should have about 380 horsepower and a little over 500 LB pounds of torque. Any Converter recommendation?. Running a 9" ford rear with a 350 gear posi.

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Old 07-03-2014, 12:38 AM
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Old 07-03-2014, 12:41 AM
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30 years ago I had a 71 Cutlass with a 350 and a 350 tranny. When the tranny went out I installed a Neal Chance street strip 350 with a 10 bolt case. When I upgraded to a 455 engine I left the 350 tranny in it. The 455 also had a Comp 268 cam. Never had a problem with it. Cutlass sadley fell victim to a driver running a red light.
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Old 07-03-2014, 12:55 AM
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Properly rebuilt with some simple clutch/sprag upgrades, and proper clearances, a 350 will have no problems.

Something in the 2400-2600 stall area would likely be good, but get it on an 10" converter core, 11" core second choice,... not a 12" bent fin stock core.
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Old 07-19-2014, 09:47 AM
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Quote:
Originally Posted by Studebaker View Post
So I am building a 455 Buick that will be fairly mild, .030 over to clean up the cylinders, stock hyperutectic dish pistons. Heads miled and mild port job/near stock compression of 8.4:1. compcams 268, and a few oiling mods for reliability, stock stage 1 intake with a carter AFB 625.
I have a few BOP turbo 350's and also two Chevy bolt pattern turbo 400's that iI I could use with an adapter plate . Will a mild rebuilt T350 hold up to the torque of the buick. It's going in a street car. Should have about 380 horsepower and a little over 500 LB pounds of torque. Any Converter recommendation?. Running a 9" ford rear with a 350 gear posi.
As far as converter I'd go with something in the 1800-2200 rpm stall range. TH350 should be fine until you hit the track or bolt on some sticky tires.

What is a stock stage 1 intake? You will need more cfm. Big Buicks like plenty of carburation. In the later years they came with an 800fm Q-jet from the factory. Also you might look at some Lunati cam grinds.
400-430-455-Block-ID-Prep-and-Oiling-mods
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