I have never seen a complete list but if you have an idea as to the year that you are curious in just do a search for "19?? S-10 wheelbase specifications" and it will come up with quite a few sites that will have what you need. Almost every car is listed out there in the www in one form or another.
If info I found is correct looked at a couple different sites:
S-10 2 wheel drive wheelbase: ext. cab 123in wheel base, reg cab. long bed 118 inch wheel base, reg cab short bed 108.3 wheelbase
Trac width 2 wheel drive:front 54.5; rear 54.6
S-10 4x4 is wider front: 57.2 ; rear 55.1