Gearing ?

Killer6 said

O/D is nice, but as has been discussed & I have warned, just because You can cruise at a 2.76-like RPM, doesn't mean it's safe to go ahead & drive like You're running them. You can easily exceed the prop-shafts critical speed if You hit the highway & get "top happy"!!

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You can go to a dealership today and buy a brand new vehicle with 4.10 gears and an Od or even a double OD trans.

They go down the interstate without issue. I'm not sure why our cars can't do the same?

I run 4.56's with a GVOD. Haven't had any issues. They knew what I was running when I ordered. Seems to work for the drag week guys pretty well.