Mike S helped me adjust the valves, so I think I'm good there. I just can't get it to idle off the idle circuit. I've check so far:
1) Backed off all idle screws on linkage.
2) loosened the accelerator cable to make sure it had slack so that it wasn't affecting throttle.
3) Confirmed power to solenoid and click when key turned to ON position.
4) Tried putting idle screw where idle was like 450 and turned idle mixture both ways with little to zero effect.
I'm starting to wonder if I'm hearing a click in the solenoid, but maybe it is not actually actuating when installed in the carb? It actuates fine when I had the solenoid pulled from the carb. Or, would I not hear a "click" if it wasn't pulling back?
Anyway, since it was so much fun, I'm half tempted to rebuild the '71 carb and see what it does on there
I think it is jetted appropriately at least!
EDIT: solenoid is functioning as it should, and the engine is in fact idling off the idle circuit.