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That is a very open ended question that will be hard to respond to without more information/constraints.
Are you talking Normaly Aspirated pump gas with no power adders, or race gas or other fuel, and are you using some sort of power adder?
You sat this is for a '70 GTX, but is it a street car or race car? How much does it weigh? what suspension, tires, gears, transmission, converter, etc are you using?




it is going to be strip only on race gas. not trying to run a class or go by any rules whatsoever. just wanted to run all motor. not sure of the weight but i was going to put it on a diet. right now it has superstock springs with 29x10 mickeys.it has 4.88 in the 8 3/4 now but i have a dana for it.i have always been told a tunnel ram will slow a mopar down but lately i have read on here thats not true.