I am in need of 2 rebuild kits for a Holley Carb the numbers on the carb are R3767 and 80466. The carb is Mercury blue so we think it is of a HP Mercury motor. They are currently on a 502 Magnum with a procharger. Holley cannot seem to cross reference that number with anything. And from what I have seen the magnums came with Weber Carbs
Any help will be appreciated.

Thanks
Mark

I am assuming they are mechanical secondary carbs. If so yu can us a Barry Grant kit # 190004 it will rebuild most double pump carbs no problem.

Try HLY-37-1544 or HLY-37-1546for hp carbs these fit 4150 dp carbs call summit or jegs they have gaskets power valves needle and seat and acc pump30 or 40 bucks!!