1975 360 bottom end power

Does thing thing barely idle? If that cam is really what you have, then that cam looks waaay out of line with the rest of the engine.. Several steps above a 268 and not even remotely like the Crower Baja Beast cam that Abodybomber referred to for his 360 with good torque. I'd run compression numbers first then if they are low, I'd pull that cam 1st thing, and put in something reasonable.

BTW, how do you use this car? Daily driver? Pure drag racing? Street drags? A lot of the combo that is best depends on your use. It will help everyone (especially YOU) to state your purpose for this car/engine.