question about posi unit and gears

[wilkin250r]

28 inch tires and a 4.10 ratio sounds like rather low gearing. Combine that with a 383, the extra stroke will add torque but it reduces revs, I forsee a whopping top speed of like 85-90mph. Yeah, it will take off like a rocket (if you can keep traction) but I think you're gonna get beat on the top end.

I think with a 383 and 28 inch tires, he can pull significantly higher gearing than 4.10.