I will second Rapid Robert's suggestion to contact Dwayne Porter. I have a custom grind that Dwayne picked out for my mild 383 build, and I am very happy with it. My application is similar to yours using manifolds, but I'm at 9.5:1 compression with 3.91 gears in an e-body. Cost was a little bit more than something off the shelf, but the extra cost was mostly for having the cam nitrided for extra durability.

FWIW, my cam is 226/231 duration at 0.50" lift, 0.481/0.480 lift, 113 LSA.