That fuel pump you bought. Is it a marine specific version, or just a parts store pump for a 351?
Marine pumps are different than auto pumps. Auto pumps have a single diaphragm, and when it ruptures, it just dumps fuel underneath the car.
Dumping fuel into the bilge of a boat is a big NO NO. The marine pump has a secondary diaphragm to catch the fuel and send it up the sight tube to the carb as discussed above.
Auto parts can be very dangerous on a boat. Alternators, distributors, starters, fuel pumps, and flame arrestors must be marine specific parts.
If you did buy a marine pump, the please excuse the rant. SAFETY, SAFETY, SAFETY. Riding in a fiberglass time bomb is not my idea of a good time.
1992 Supra Mariah - Red
PCM 351HO 285hp - PCM 1.23:1 Transmission
OJ XMP 4 Blade CNC 13x15.5RH
"People do weird things to boats" -Unknown