Just a 284-484?

1971 street/strip 340 Cuda back in 1982. full interior, all stock, 3.55's, 8x26" slicks, B&M super holeshot 3500st, ally dual plane, 750DP, 484/284, small tube hdrs, best was 13.26@101+, added 850DP+HS strip Dom intake+2" open spacer, [email protected] works out@around 320fwhp for weight/mph...3500lbs+@line with my 200lbs+. Would some ported heads really add 80+hp to my combo? to make these 400/425hp combo's a reality with a 484 cam, I wonder.