Well I pulled everything apart and the cam timing was correct.Also pulled the intake and the lifters to check for any wiped out cam lobes.Everything was fine nothing unusual. I reassembled today and I'm back to square one.The timing wants to be all the way on the triangle to get a nice smooth idle. The motor only wants to start and run with some choke on even when up to temp. I've never seen a motor pull this kind of air. It almost freezes the base of the carbs from the volume it's pulling.I'm really baffled. Is it possible that this flywheel is not right for this motor? and I'm timing it and setting the valves off the ball. Seems to me it wouldn't matter.It's an 11" clutch setup that was off the old 53 hydraulic motor that came with the truck and ran ok. Also is it possible that this reconditioned 848 head could be the reason for the exceptional air flow thru the intake. It was just a standard valve job with a few new valves and all new springs and seals and shaved a little to true it up.Keeping in mind that this same intake, carb,dizzy and exhaust all worked decent on the old motor.sorry this is long but I'm really reaching for answers to this.Don't know what else to try