I will be running a 305 I have laying around. I am using a chassis engineering bolt on mustang 2 front suspension. I also have a 350 turbo tranny. I have a rearend that a friend gave me and he said it was from a camaro. I will have to replace the gears, bearings and do any other repair. I heard that a ford explorer rearend was a good choice and also the s-10 4 wheel drive rearend was a good choice. If I use the 350 tranny I do not want a gear over 3.08:1