383 cam choice

I'd say Hughes hel2226, it's just over .500 lift, they call it there 440 sixpack cam. It isn't big but it would probably be the best for what parts you already have. You have a low compression 383, well maybe low to mid 9s which you can work with, but if you go too much bigger you'll need more stuff to make it work best, that being said I ran the Mopar performance .474 with a very low compression 400 in a 73 charger se, I ran it for months with the 2.76 gears and stock converter .
It really really woke up when I put 3.90 gears and headers. That cam is around 237 at .050.
Good luck with your hunt.
But hunt for Hughes, their lobes are chrysler specific