409/ZF-6 speed combination

409 lever

Well Known Member
Supporting Member 2
4.30 rear gear with a 2.86 1st gear that is 12.298 to 1!!! that is a crap combination,,unless you have a dumptruck or have a engine under 300 cubic inches. if it were my car I would go with a 3.55-3.73.
 

Simps37

Well Known Member
Supporting Member 2
Using the Mark Williams calculator, and being able to adjust RPM's...........am thinking 4.10 may put me there......
 
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