Last summer was the put it on the correct frame and this winter its 6.0/ NV4500 swap on my 77 Cheyenne K30 dually.
I can't stand the 454 and SM465, can't get the truck out of the way of traffic.
BTW 104K mile 454 carb to pan for sale cheap.
I picked up a 90k mile 6.0 out of a 01 2500 suburban...