my 70 swb had a 250 straight six w/powerglide factory
I needed a little more grunt for towing... fitted a warmed up 454 with roller valve trane,headers,alum intake ect. ,400turbo
I swapped the mounts and stands from a 1974 chev half ton, just drilled new holes in the frame after placement was good...
switched to a 4-row radiator and even used the old 6 cyl radiator shroud
had a one piece drive shaft built with a slip spline, and got rid of the 2 piece with carrier....
worked out nicely
