http://www.jalopyjournal.com/forum/showthread.php?t=171291&highlight=s10

http://www.mongosgarage.com/tech/t5/index.htm

http://www.inliners.org/Jack/t5_page.html
http://www.inliners.org/Jack/T5tech.html

http://www.stovebolt.com/techtips/t5tranny.htm

Basically, you can use any T5. A T-5 hybrid will not require you to cut the snout pilot or the bearing carrier, or elongate the splines.

T5's can be found in the 1982 - 1998 S-10's with the desireable rear casting (although you can buy this from a few vendors)
Astro Vans from 1985 - 1988 had the T5 as an option behind both the 4 cylinder and the 4.3 V6, (the V6 has the better spline lengths)
The Camaro units are canted 15 degrees to move the shifter to the driver, however if you change the rear casting, this isnt an issue. The Camaro units came in the 1" 14 tooth version for the 4 and 6 cylinders and a 1 5/32" 26 tooth version for the V8. 1996 and later camaros used a box more closely to a ford box than a GM box
The Ford units have a larger bearing carrier (5" vs 4.68"). The 93 Cobra unit is the strongest US production T5.

Hope this helps.

The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me