tried capping off the vac advance. didnt help. put the idle screws at the richest it would run. didnt help. adjusted the acc. pump for the longest duration of squirt. didnt help. still get around 20 to a gallon. waiting on my federal check to come back then i plan on getting a 600cfm holley 4160 but havent heard anything back yet. the junkyards around here dont have andy 4bbls from 318's or 360's with the exception of one thermoquad that needed a complete rebuild with several linkages replaced but they wanted 200 for. i was thinking of ordering a thermoquad from summit but theres so many different ones i dont know which one i need.