I asked that very question about electric fuel pumps almost a year ago - tho stayed with the mechanical after a lot of under my car time running lines. There are some pretty good answers in the thread below - and Holley, tho not the worst choice, was not one that I would have used as they are quite hard to mount in a confined space and are noisy. As far as reliability - I have run them on various cars for years with none of the problems that others have had - might just be my good luck and others bad.......

http://www.clubhotrod.com/forums/sho...tric+fuel+pump