Need help deciding on what size turbos to get.

[Project69]

New to turbo field so some help would be great. I got my el-chepo headers coming and now i need to buy the turbos. What size would best suit my needs? Im guessing some info is needed.

Im looking for atleast 650rwhp, with good street manners, yes its gonna be intercooled also. Ive got a 383 with forged crank and pistons. 5140 rods. 9.5:1 compression. its gonna be carbed. Any size and company reccomendations?

Also if you need any info let me know.

Thanks