While I agree that the Toyota set up is a good unit I have not seen one installed in an AD truck. I have installed them in several TF trucks and a 56 F100. There are frame to engine clearance issues on AD trucks made even worse if it has a V-8. Several aftermarker suppliers offer a kit that uses a Saganaw box from a mid 80's truck. I beleive someone on this site did a write up on the conversion.
As coilover stated nothing is a a bolt on.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine