Thanks carbking, I was hoping you would respond since you seem to be the expert around here. That chart you posted which Iv seen other places, shows the 966s to be an auto choke, but all the 966s' Iv seen appear to be manual choke. Iv also seen the 966 listed as an option for engines with manual choke. Maybe I'll contact the seller and ask him to measure the bolt spacing again. Maybe he measured wrong, or maybe somebody swapped the throttle body at some point. Thanks guys!