Starter for '93 1500 w/V6?
 

Stopped by my local NAPA today and figured that picking up a starter for my truck would be pretty simple.... mine is clearly on it's last legs.

They say that there are two different types?

Anyway to tell them apart BEFORE I take it off so I don't have to bring in the starter only to find out they don't have one?

Thanks

1993 GMC 1500 V6 2WD