We don't know **** here man, you need to figure out what you want to do with your car. You are making this too complicated.
Example;
1) The car has a 7 1/4 2.76 pegleg, tire height is 26". Don't even get a lunati 10200701 if you are planning to run that rear end, even that cam will destroy it within a couple of years of beatings.
2) The car has a dana 60 with 456 gearing.
Go nuts.
If I remember correctly, you are just cruising around in a 4bbl 318, right.
The perfect cam does not exist! Get good enough. Read RustyRatRod's guide to hot rod bliss.
Or go down the road at 6,000 rpm. What does that sound like, how often do you do that? Where do you do most of your driving? Go to lunati or comp or isky or crane and find a cam that is designed for that rpm range where you do drive.
If you want to have that rumpitty-rumpitty, look at the Hughes whiplash line or the comp thumper/motherthumper line
Or call a cam grinder.
Eventually you are going to have to pick one and go with it, and don't forget about buying the correct converter.
