i have a 79 TA with a 68 400 in it i'm might be changing the rear end diff to either a ford 9" or a dana 60, but i was also going to change the rear suspension in it to either a 4 link or ladder bars, the purpose of this vehicle is a street machine and i might take it to the track once in a while. i need some suggestions i priced the kits from Comp Engineering i don't know if that is a good way to go or what so please help me, i understand most of it but i'm still a little confused about some aspects of it.
Thank You

Four links are totally adjustable, which is great if you have somebody who knows what they are adjusting for, they also would ride better on the street.
Ladder bars, once correctly set up are constant, very little adjustment and stiff riding. but easier to work with.