I am going holley just because I have had such good luck with projection in the past. I did fail 1 original black 2bbl pump but switched to the 4bbl walbro, 20 years and 114,000 miles later it all still works. I just hung the pump in the frame with the stock lines. I have changed the tps once also. These systems really like a good alternator that will provide full 14 volts at idle, mine had the leece-neville from the start, may be why I had few problems.