429 is pissing me off!! I have no idea anymore as to the problem! Please Help!!

[commercialcobb]

Here goes... Since the complete overhaul of our 429 with a heavy flat tappet cam and other goodies (ie. high rise intake, MSD 6AL, MSD Distributor and Coil, Tremec TKO500 5spd, Ford 9" with limited slip rebuilt and 355 gears with 28" by 10" road tires on the rear) we have had one major issue and can't get a grip on it. We thought it was our Rochester QuadraJet/QuadraBog/QuadraCrap and have had that thing tuned so many times but when we step on the gas in first and only first gear it's off to the races!! Good times, heaven forbid I wanna smoke the tires!! When we light em up in 1st and really get em spinning it starts bogging at 4000 RPM's at which point the tires hook up and it starts bucking like a bronco on steroids until I let off to shift up or give up. Now when I start out spinning them it's all fun and game but when I really put the spur's to it and the RPM's start heading for the roof (6000 RPM Red Line Limiter on the MSD 6AL) it shuts me out at 4000. I have my timing set at 16 and I thinks its 33 at 3500. I can smoke them from a dead stop in 2nd and 3rd gear with no problem. Is there some kind of limiter that stops the MSD from shooting up to fast (say 4000rpm)? Every where else she runs perfect.. Fires up perfectly from dead cold starts with a bit of motivation on the hot starts and fly's through the gears if I don't try to burn em up in first. COME ON, IF YOU CAN'T SMOKE THE TIRES, THEN WHATS THE POINT?? Just kidding but please try and help me get this figured out. I don't want to pay another carb dude if thats not the problem.. Thanks in advance.. (The photo is old, but the parts ar ethe same and the vacuum advance and any other things missing are now in place)