Dripping fuel or getting crazy pumping it upon start up is an issue with these intakes - cause they do like to go boom. Look for fuel dripping it can be a high float etc.. but one cause of dripping fuel is from these new edelbrock carbs. If you ever backfired an newer Eddy carb you have a better than 50% chance it will drip. it's an issue with the casting method that was not seen on the original carters - look at primary from underneath mainly around the idle air bleed screw for small cracks or worse yet missing material. The other issue is the screws on the throttle paltes coming loose and causing the throttle plate to mis-align and cause a high idle.