i have a 51 3100 that i have fitted with a 78 305 tubo 350 and nova rear end my problem is stalling when returnig to idle after burnig the tires i have checked for vacum leaks tried the timing at 4 and 6 and 8 degrees nothing seem to help at all the weird thing is that it will restart without touching the gas pedal the carb is a neww edelbrock 600 any ideals ??