Need help with 383 setup

I agree with BJR. Try to get some newer 906 , 452 type heads or even the closed chamber 915's can work good. We have a 400 in my boys car with KB pistons and they have nice size valve reliefs. They are .025 in the hole and with the MP .557 cam it has about .200 piston to valve clearence. I know they make 383 pistons but I dont remember the comp height or about where it sits in the hole with stock deck height. I would consider the Eddy Performer RPM intake as it's a great street/strip intake. The boys car ran 11.55 with it compared to 11.59 with the single plane Holley SD. With 3.55 gears you will like the Performer RPM intake. As for carb I like the basic Holley 750 DP on mild street combo's. Got one on the boys car also and it works nice. Good luck , Ron