My issue began when Rock Auto showed TH147 for a 1996 Tracker.
From reading your pages I knew that had to be wrong. I started checking
part numbers, and found that the item is also sold under the Mikuni brand
name. Your pages did not have Mikuni numbers. I think that I may have
successfully identified those numbers. The pre or post 1996 rule does not
always apply. I have established that the 1996 Geo with California emissions
takes the 1995 part. Like you wrote, the only real way to tell is to have the
actual part in your hand.
From reading your pages I knew that had to be wrong. I started checking
part numbers, and found that the item is also sold under the Mikuni brand
name. Your pages did not have Mikuni numbers. I think that I may have
successfully identified those numbers. The pre or post 1996 rule does not
always apply. I have established that the 1996 Geo with California emissions
takes the 1995 part. Like you wrote, the only real way to tell is to have the
actual part in your hand.