question about 307 heads

[mbc9ieII]

Ok, I currently have 91 350 TBI heads with a mild port and polish job on there right now, will those flow better then the stock 307 heads, i also have a set of 1977 350 heads off of an el camino ss and an extra set of 350 heads lying in the back. but have read alot on here about using 305 heads. I am on a limited budget right now but want the best performance i can get. what heads are better for my set up. i have 307 with .488 lift cam long tube headers 650 holley eldebrock intake and spacer and the current 91 350 TBI ported and polished heads.

let me know what you all think


thanks