... With my 3.08 I can take my car up to 160mph and still be a tat under where redline starts, but if you never go above 100mph the 3.90 is good, but you would redline probably at around 120mph with an AUTO Tranny...
That is some decision making criteria I did not consider in my rear gear ratio selection.
As mentioned above, cam, convertor, tranny, rear tire diameter,... all factor into the decision. if you're changing your carrier, why not go posi-traction? This allows you to wear out both rear tires evenly.
I'm a hobbyist. Not a professional. Don't be hatin'!
