Your attention to detail is great, the frame looks great. I'm using an S10 frame on my 53 Studebaker Couple turned into a Fleetside pickup! Just in the process of disassembling the chassis.
Just for your info, the Chevy Astro/Safari van rear leaf springs are same as 2" lowered S10 springs!
I have built 2 projects on Killbillet. 1939 Oldsmobile pickup? and 1953 Studebaker Fleetside Pickup. Check them out!
Got the 5.7 HEMI home and started the install. The modification for the install won't be too bad front motor mounts will be pretty straight forward, I will have to build the trans mount from scratch. I will also have to put in a rack and pinion steering gear. The front pulleys won't allow me the room for the original steering gearbox.
A 93-95 Dodge Intrepid has a front steer rack with the inner tie rod connections at the center of the rack, it is the front steer equivalent to the rear steer Caviler rack with the center connections. It might make things easier. Gene
I used the Dodge Interpid on my 39 Olds Pickup in Old Skool section and it worked well.