I don't know if you can keep that 400 cool with the best cooling system you can buy, they're prone to running hot from the factory. Then you stick one into a tighter area than they are used to and can't disapate the heat from around it. You may need to run a performance aluminum radiator and a puller fan with a low temp thermostat to keep it under control. Just one guy's opinion,
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!