LA with sinle groove bottom pulley

oldkimmer said

.............Hey Bruce, ur top w/p pulley......is not correct for a 74 w/o air conditioning....unless it had an idler pulley and a dual grove alt pulley, I see u have the dual alt pulley....did ur car or the vehicle u got it out of have a/c.........kim.......

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It had A/C, it was removed when I got it, and just what you see remains. I did cut and modify the bracket that held the compressor.

So if I'm following along correctly, the water pump pulley should be deeper so that the belt runs around all three, instead of two belts.