/6 Build Question?

Mopar freak hit the nail on the head. It isn't as simple as dropping a V8 in there. My brother in law was going to give me a big block for my Valiant but after running the numbers for upgrading the suspention, brakes, trans, rear, driveshaft, exhaust, cooling system, fuel lines..... it would have cost me way more than what I have spent to get my slant into the 15's. not to mention all the time I would not have the car to do the V8 swap. I never went a whole day with out the use of my car while building up the slant.
With a simple gear swap in the 8 3/4 I can get 20+ mpg.