I am looking at a March serpentine belt system. Any advice on these? Any problems. Can you use a stock fuel pump?

 

I have seen were some serpentine belt systems have thicker water pump pulleys (at the bolt flange), requiring spacing of the rest of the pulleys for correct alignment.

 

I have a march system on my 440 and the fit and quality seemed excellent. The only thing that had to be changed from stock was the water pump to get the thermostat housing to run parallel to the pully but my pump and housing needed to be changed anyway.