Kool working on rebuilding the 400 in my '76 right now. Going to make it into a sleeper of sorts. Shh. Cool truck. Be on the look out for ya.....
You gonna lower it? I hope to lower mine and make pretty much a simple ride really. Just fun though. No fancy gizmos just something fun to scoot around in.
I did those 60-66s for 10 years anyways, if it was a stick and you don't have the auto x-member, the newer 67-72 trans xmember is a perfect fit. Most guys don't use a good replcement like the GM that ties to the top and bottom flanges of the frame. There is so much weight on the two frt cab mounts that the frame kind of twists outwards at the cab mount brackets without either the factory stick bell xmember or factory trans xmember. everyone I did except one got ps and pb...those are a must. Discs not needed unless hauling big weights 63 was the last year for a welded on panard bar on the diff, Just transplant that onto your donor rear...any p/u rear to 87 fits nice. Use 4wd rear for 6 lugs, or 2wd donor for 5lug. 70 up is 1.5" wider which helps fill those rear fenders better. If stock wheels are going on it, use 70s-87 4x4 6 lug wheels, they are radial rated and a nicer offset. oh, and grab a swaybar & brackets off a 67-72; perfect swap. 3/4 ton bar is beefier.