Thought there was just the early to ~ 76 spacer. Didnt realize there were others. Ive got a 78 2F in a 71 FJ40. Looks to have the short pump (68-74) with the four blade fan, probably the original 71 pump. Pump is 5 5/16" tall and the pulley bolt holes measure 2 1/16" center to center.
Im slowly working on a Scout PS conversion and need the fan spacer to let the double row pulley clear the pump housing and line everything up.