The truck was running a 1965 327 300hp block out of an Impala, with a 350 trans. Engine is currently disassembled. The transfer case is a Dana model 20 / 300 dual range case, with a Dana 30 front axle and stock Datsun rear.
I have big plans for this beast.... but for starters I've found a complete and running 327 to put in for now to sort out all the wiring, cooling, fitting, etc. Even though the truck was built in the '70's with a 327, it is pretty much gutted at the moment leaving lots of "fun" for me to sort out...