My freinds have all went the 429/460 route but I want to keep my 400. I don't want to get out of the throttle because of detonation while towing my 10000lb trailer up steep, long, western mountain passes. I know that wide open might mean 40 to 50 miles an hour in some spots. The 400 might not be perfect for this, but I want it to be as good as it can be. I am pulling my motor for rebuild and would like some cam suggestions. This is the setup I'm considering.

Cam ????
Block/heads decked to get 8.5cr with stock pistons
1.73 rockers(stock ratio)
Dual plane non Egr manifold
4V 650 carb
dist curved for non Egr appl.
Straight up timing set
Headers
C6/4.10 gears/31 inch tires

Thank you