Need a picture...
1 groove alternator pulley
2 groove water pump pulley, with the inner groove a smaller diameter than the outer.
2 groove power steering pulley
3 groove crank pulley, with the outermost groove large, the inner 2 grooves smaller diameter and of the same size.
Belt 1, closest to the block goes on the inner (small diameter) water pump groove, the outer groove on the power steering, and the center groove on the crank.
Belt 2, outer belt, goes on the outer groove (larger diameter) of the water pump pulley, around the alternator, and on the largest (furthest from the block) groove on the crank.
Hope this helps. I think the el camino setup is very similar to the vette's.









