Yep me too! Sure seems to have been popular back in the day.
Todays plan is to use the K3500 spring pack. Don’t really want to use any blocks like the pic below. So for now it looks like the K1, 2 front hangers with the K3500 spring packs (need to remove 2 add a leafs per side). Rear hangers will probably be K3500 also, TBD by ride height with the front end loaded up.
There is quite a bit of difference in most of the rear hangers. Since receiving the shipment of K1, 2 rear hangers from DLTruck1973. I found out that both the K1, 2 and my 72 C30’s rear hangers are all the same. I’ve got 2 sets of these now, oops. The Longhorn frame has some earlier cast style w/grease able pins (cool) that I probably won’t be using. The K3500 rear hanger set is probably the most HD and will yield the most lift.