I really screwed up the engine build for my s-10 Blazer project. I had an ok 350 making around 390hp and 405lb-ft in there and it develpoed a crack in teh block so I sold it and got a 454. The 454 came out of a '97 Suburban and I had the L29 heads freshened up with a mild pocket port job and new stock sized valves. I also installed a ZZ502 roller cam and a RPM AirGap intake. I was hoping for 450-500hp. I know that it was optimistic, but I can dream right. Now here is the problem. DD2000 tells me these numbers should be true using their flow numbers for the L29 Vortec heads right from the manual it says which setting to use(450hp and 550lb-ft).

I got the actual flow data from:
http://users.erols.com/srweiss/tablehdc.htm#BBChevy

these flow numbers for the L29 are worse than the worst peanut port heads.

lift int ex
.100 63 49
.200 121 91
.300 165 120
.400 198 133
.500 226 140
.600 242 142

the small block vortecs flow more than these piles of steaming poo.
Now it appears I've built myself an expensive and slow boat anchor. With these flow numbers I'd be lucky to make 350hp@4000rpm. If I was driving a motorhome this would be great, but I have it in a 3500# street/strip car.

I ran low 13's with the small block now after spending over a year and close to $4000 I'll be back in the 14's.

What should I do?

Should I get a different set of heads like the Brodix Racerites? and live with the extremely low CR. I'm kind of stuck with a factory port location due to my custom built headers.

Should I tear it out and start over?

Do I gear it with 2 something gears and hope for the best?

I really feel stupid now...