King Pin D60: 86-91. They were all leaf sprung though. [img]images/graemlins/frown.gif[/img] Most guys I know that have done the D60 coil sprung have adapted the solid D44 radius arms (78-79 Bronco/F 150) to work with the D60. Here's a post
that explains that process a little. IMO there's 4 levels of difficulty when going to a D60. 1: leaf sprund shackle front 2: leaf sprung shackle rear 3: coil sprung 3 ling 4: coil sprung 4 link.