The driveshaft angle does not matter, it's the angle of the rear of the trans and the angle of the pinion on the rear like mean green said, measure and add together. I have my pinion angle 2 degrees down with a Caltrac rear suspension and works well.
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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.
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