There's alot more to it than just installing a V-8 into an AD truck. Every system gets re-engineered to make it work. Steering is the biggest issue, then cooling, then the electrical, etc.
Just looking at the big picture. I did it to a 48 4400, it's involved,(but worth it)
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!