.....Thanks Tech, whoops I did the formula wrong! It's bored .030 over so I went;

1) 398 {cid} x 6000 {RPM} divided by 3456 = 691.

2) 8 {boost} divided by 14.7 = .5442

3) 691 x .5442 = 376

4) 376 + 1 = 1376

5) 1376 divided by 2 = 688 cfm for each carb.

BUT what I should have done was;

1) 398 {cid} x 6000 {RPM} divided by 3456 = 691

2) 8 {boost} divided by 14.7 + 1 = 1.54

3) 691 x 1.54 = 1064

4) 1064 divided by 2 = 532 cfm per carb....

oh & I forgot to change my home town but I'm back in Calif at sea level again.... my bad....

I also thought I'd may be run a little lower compression ratio {7 to 1} so I could run a little more boost {10 pounds} but even then I'd still only need a total of 1160 cfm divided by 2 = 580 cfm per carb.... which would be two 600's..... THANKS again Tech!!! Bill