It is likely too big a cfm carb. what works good in the summer on a racetrack aint worth a hoot in subzero. For the street u could get lots of power with no bigger than a 500 cfm carb. And it would start and run every time. Also even tho I dont have much use for holley carbs it probably dont have as much to do with the brand as the mis application. Ives rdhotfrd