I had an external electric fuel pump on my FI 383 SBC for 7 years before I sold it. The pump was a quiet Edlebrock. I installed a regulator and a pressure gauge. No problems. The only thing I was told to watch out for was cavitation in the pump due to too small a line going in, or too restrictive of a filter going in. I had a 10 AN line going in, and an 8AN line going out, which eventually necked down to a 6AN at the injectors. Had a 100 micro fuel filter at the inlet. Lots of pumps available, but try to get one that's durable and quiet.
