Thanks for all the replies. Years ago I had another 67 440 with the same pistons, heads and factory intake. It was bored .040 and I used factory HP exhaust manifolds. I ran the Mopar 274/474 cam. I had it in a Duster with 3.91 gears and factory high stall convertor. That car was fun to drive! I suppose the Summit cam would work for what I want. I very rarely tow anything with the truck and the 6401 cam doesn't sound like it would be too lumpy anyway. Also, I have a new one sitting on the shelf, that I bought for another project and never used is a plus.