Dan, I have one from a 73 LeSabre w/350. It has been rebuilt once and does not have any play in throttle shafts. I think all you need to do with this one is degrease/degrime it and bolt it on. $40 + ship Email me directly w/your zip code at GStage1@buickperformance.com
The apollo uses the kickdown cable for the 350 turbo trans. Dont think your carb has the button does it? Dan