Some 1st gens had 6 groove alternator pulleys. I know; I own one. They were usually on stuff with A/C, rear defroster, and other electric-heavy stuffs. You'd need a 6 rib 1st gen main pulley for all that to work, plus I'm pretty sure the idler won't mount properly. Why do you want to switch to a 2nd gen belt system...for the UDP? Personally I wouldn't underdrive the 1st gen alternator, and the power steering pump definitely needs to stay where it is, otherwise you should just disconnect it because it won't be helping much. And, pulley mods are good for very little, to no power gain...not worth it unless you're racing and need every last pony.