1972 C10 balancer & pulley problems

[rustytruck50]

Hopefully this isn't as difficult as it feels, but here goes headscratch
The truck in question is a '72 Custom Deluxe 10, 350, auto, ps,ac. I've owned it for almost 2 years, driving it pretty much daily. The engine is original to the truck, verified by the pad on the block. Sometime in the truck's past, it was converted to HEI, but the distributor was not put in right (#1 not in right position on distributor). The intake was leaking pretty good, so I thought it would be a good time to fix both things.

I will admit, I didn't take note of how the distributor came out only because it wasn't put in right to begin with. When I found TDC, I lined up the balancer on zero on the timing tab, set the distributor in place with one on the rotor pointing at the #1 cylinder. When I grabbed the timing light and tried to set the timing, the mark was nowhere to be found, kinda. computer_punch John & I were pretty confused about this & just for fun, I shined the light from below and found the timing mark at about the 4-5 o-clock position. My first thought was to do some reading on line and the general thought was the outer ring slipped, causing the problem with timing.

I bought a replacement from O'reilly, pn PB1046N. I compared it to the one I took off abd the size was the same, but the mark was in a different location, about 2" away. Once I went to put the crank pulley on, the ps, wp and ac pulleys no longer line up. I tried spacing the crank pulley, but that corrected the ps alignment, but nothing else. Next, tried to space out the alternator bracket only to find it not right either. If you're still on board, thank you!!!

Confused and frustrated, I checked the number on the back of the old balancer, 6272222. I Googled this and not surprisingly found that it wasn't right for my truck, fits almost everything else. Need to note it has a short waterpump with a two groove pulley, the crank pulley is a 3 groove, single groove ps and ac. I believe the timing cover to be correct with the tab at about1-2 o'clock. Everything I've read says the short waterpump is right, but I question the pulleys. Should I go back to the old balancer and use the pulleys that I know fit? Do I even have the right pulley arrangement?