383 combo advice

I'm really hoping they lose that nick name this year!! (slippery rock) but speaking of heads IMM engines "IQ52" I think sorry if I'm wrong, did my rpms about 5or6 years ago and on my mellow 512 (400 based) engine they are great!!! 69 steel dart 10.12 @ 132 car picked up about 1/2 sec and still going strong. Leaf springs and a 9 inch slick..