Anyone running these with good luck?? I would love to go the electric water pump route but I just dont trust them yet. So...I am looking at the power and amp pulleys by March. These are supposed to give you some power back while still getting good voltage.

i'd stay with the good old reliable factory engineered setup. why screw up something they spent a lot of money and time getting right? take that cash you'd use for the pulleys and put it somewhere else- like a cam swap or something that makes a real difference in power.
if you MUST swap pulleys- head to a boneyard and look at a few cars with the same water pump setup you've got- there were some long water pump vehicles that had a bigger water pump pulley, which would slow down the water pump a tad bit and free up at least 2 or maybe even 3 horses. plus, it would be dirt cheap.

I am running the power pulleys on my 468 and i have not had much trouble with mine charging except when my headlights and my fan is on (the fan pulls like 25 amps) and this is only at idol in gear 750-850 rpm

The reason i went to the reduction pulleys wasn't for HP but to slow the belts so they would not fly off no matter how perfect i got the alignment and once the belt stressed my glass hood and cracked the paint they were off.

I wouldn't get the pulleys if you are looking for a few hp, i did'nt even notice the slightest change in performance.

have them on my 94, like em
wanting the big serp conversion set for my 68