GM TBI, like most fuel-injection systems, requires relatively high fuel pressure to operate properly. The factory AMC fuel pump is a low-pressure mechanical unit that is good for sending fuel to a carb but is useless for the Howell system. Howell addresses this with its kits by supplying an electric inline fuel pump, a couple of fuel filters, and a mechanical fuel pump block-off plate for the AMC engine. We mounted our fuel pump and filters on the framerail of the truck. The multiple filters help protect the fuel pump and the injectors, which don’t tolerate junk in the fuel well.