Using a TCI, Mustang II, Power Steering, Coil Spring System, Cross member with a SBC Engine (327CI+).
Original Frame but boxed about 90% front to rear.

http://totalcostinvolved.com/products/1947-1954-chevy-truck_coil-spring-ifs/

The only issue so far was that an A-Arm was not built correctly. They sent me a replacement and had it within 2-day. Great support.

Not many miles on it yet but so-far-so-good.