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#11
11-26-2022, 04:04 PM
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Bruce, I'd opt for a new 3.08 gear behind your 455. I have a new 3.08 gear (Yukon) & Eaton posi unit in the 12-bolt (McKinnon out of a '70 GP) in my '70 Lemans with a 461 with an M-20 4-speed trans. It pulls away easy from a stop in 1st gear and runs at 2650 rpm at 70 mph. With your TH400 automatic, it's a great gear for a 455 with abundance of torque to easily overcome that gear. My brother has a '71 455HO GTO with the factory 3.07 12-bolt that easily runs low 13's and can cruise nicely on the highway.
Dennis |
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