Gas leak Holley 1850
I hate those Holleys with the transfer tube...I always change out the bowl to the dual center hung bowls...
probably not the answer you want....
[ame="http://www.ebay.com/itm/Holley-4-barrel-26-37-Carburetor-Transfer-Tube-O-Ring-Seals-/261647179840?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ceb632040&vxp=mtr"]Holley 4 Barrel 26 37 Carburetor Transfer Tube O Ring Seals | eBay[/ame]