No matter how tight the budget is, DO NOT put that cam in it. That cam is designed for everything you don't have : high compression, high stall(edit, realized your was a 4-speed but I still don't think that would help enough to make me want to run this cam in your 383), numerically high rear gears, and a full 440 cubes would help.

If the budget is that tight, I would rather run the stock cam. If you still want an aftermarket cam but don't want to spend $$$, I'd look at the summit cam/lifter kits. The small summit kit K6400 is roughly equivalent to the stock 440-hp cam. And it should work fine with your current springs.