I will have to check exacty what plugs we run, autolite brand but not not sure what heat range. Something off the shelf at Kragen probably.

The ignintion is a MSD6a, we have tried the back up box and a switched to a new coil last season, car still cuts out first pass. I have ohmed the MSD plug wires, they were within spec, and new cap and rotor have been installed. We run a high output alternator, and have verified the MSD sees 14 volts when the car is running. Distributor is locked out at 35 degrees and still never kicks back. So I am thinking it is not the ignition.

The car starts excellent hot or cold, it idles good, never stumbles or surges when staging or idling around the pits. Never kicks back when starting, never seems to flood or act like it is too loaded up. But it will cut out in the water box first burnout of the day.

So I should try a bigger mid speed air bleed? (I always get this backwards)

It was suggested to remove the air bleed all together? (I don't think he meant to plug it)?

Thanks again for all the suggestions.