What cam?

IF,

That Valiant has 2.76 or 2.94 Gears in that Rear, that #265-DEH Camshaft will be a
sacrificing a lot of Low-End with a Low-Compression 318.

I have a 2.76 in my Swinger. I think the 3.23 Sure Grip I have waiting in the wings will be a nice improvement without sacrificing highway mileage.