I'm building a 73 swinger, it's a v8 car, and hasn't run in four years. I have had a few a bodies among others and this build is gonna be the one. Right now its a typical 318/904/7 1/4 car. Last time I had a 7 1/4 I built a sturdy Lil 318 with an isky Mega 270 and some kb's and that thing chewed the teeth up on the spider gears and cracked the ring gear. I still have a cup full o teeth from that diff, ha! Anyways. I learned what not to do. So this time I intend to purchase a few things from 440 source, shoemaker, and moser to name a few and we'll just see how it goes. I want to back half it, that will be one of the first big projects.