I may be going about this all wrong but I will put in my two cents just the same. I just acquired a 71 Dart with a 383 under the hood. I got this car in a package deal of four cars for a total of $2500.00. The other three are a 70 Duster 340 4 spd. Said to be matching numbers but stuffed in the nose (rebuildable), a 74 Duster /6, and a 66 Dart 318 4 door. The Dart was a slant six car originally and I'm not sure yet what the previous owner did to make the conversion other than he put in a big block K-frame. It still has the small bolt wheels and drum brakes all around. The car sits level as it is. The motor has a slight knock in the bottom end. I am planning on a stock rebuild of the 383 and the transmission. I plan on putting in a set of flow masters and also disc brakes on the front. I'm not going to race it, so other than an occasional burn out it should make a nice cruiser with no other mods. I am hoping that the rear end will tolerate that. I'm going to spend my money on restoring the interior and body which are acceptable for a driver but not a cruiser. Gregg