I would say maybe 20 to 25 pounds , larger pistons , longer rods, steel crank vrs cast maybe , truck engine might have a steel crank not sure. Hard to answer for sure.
All 360's were cast cranks. I do believe the block castings are a little thicker, more meat around the cylinders and in the bottom end than a 318. Crank up the tbars a little, check the alignment at home, and drive it!
