This may very well be the time that you are wrong. The op hasn't really said anything about how the car will be used. The cam choices that he originally listed are mild at best. Bigger valve's and ports are better for higher rpm's, making power and I agree but with his cam choices the bigger valve's and ports will hurt low rpm velocity which affects throttle response and low to midrange torque. From what little information that the OP provided he would probably be better off with cleaning up the bowl area and a good competition valve job. As you should know, bigger valve's and ports move the power band up as they improve flow and high rpm breathing. I also mentioned above milling the cylinder heads and having the deck milled for a zero deck height, the small block mopars that I've dealt with all had "blind " cylinder head bolt holes and when there had been almost a 1/16" removed that makes the heads bolts that much to long and could cause inaccurate torque reading of the head bolts as possible causing the block to crack between the bolt holes and the outer part of the block ( exhaust manifold side ). These are things that you yourself probably never thought about. You probably can't stand it that it's possible that I could be correct for a change.