Help me choose camshaft...

Stock -66 383 2bbl now with:

915 heads,
Mopar alu M1 dual plane intake,
Eddie 1406 carb,
HP manifold,
dual 2 1/4 exhaust,
727 with stock TC,
2.76 open rear end,
Mopar Performance electronic ignition with orange box.

This winter I'm going to change lifters as some of them makes a little noise, I'm consider to change the camshaft as well but I need help wich camshaft I should choose?
I know it's a low CR engine and I'm not looking for a screamer, just a little more HP and maybe a little more low end.
Is the 252 duration stock camshaft good enough for this low CR engine or is there any suggestion on a camshaft thats make a little more HP with resonable mpg?
Experience please.