Quote:
Originally Posted by 1969GTO
The picture shown of the Posi Unit, is it the same as a 4 pinion SuperDuty Safety Track found in a 1968 GTO?
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I think it's called a heavy duty 4-pinion posi, used with gear ratios of 3.36 up to 4.33. The rear ends could be upgraded with Nodular iron center sections instead of regular gray cat iron.
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1967 Firechicken, 499", Edl heads, 262/
[email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#.
[email protected] mph with a 1.45 60'. Still WAY under the rollbar rule.