Is this possible? I have an '87 K5 that used to have TBI. All TBI stuff including engine, etc. has been removed but the tank is still there with the in-tank electric pump. If I want to run a carbed engine, can I just rig up some electricity to the in-tank pump and have it pump through the manual pump on the block, or will this cause problems? IIRC, some manual pumps are passive and let gas through when they're not turning, and some are blocked off if they are not in use.