Here is the serpentine belt diagram for a 1996-1998 Chevy truck with the 4.3, 5.0 and 5.7 liter engine. Removing the belt is very simple. Using breaker bar and a socket that fits the center bolt of the tensioner pulley, rotate the tensioner to create slack on the belt and slip it off the tensioner pulley.
water pump is to run a two groove water pump pulley, a three groove crankshaft pulley, and a two groove (V-8) power steering pump pulley. This pulley arrangement will be used in all Alan Grove long water pump bracket applications, however; in CASE 2 applications, the alternator and A.C.
The best stock 10si GM alternator ever made from the factory only had a max output of 63 amps and low as 37 amps, with the exception of the GM high output 15SI model, and it used an oversize case. Its output was right at 80 and 100 amps depending on options.