It is WAY beyond my upholstery skill level to fabricate new seats by "splitting" the original bench seat. The frame would be a matter of looking at how the mounting "sides" were made and reproducing them so you had your "split" bench". Buy a discarded seat frame would be the easiest. If you wanted to put completely different seats in your truck, if you do a search there is a wealth of information to be found.
Try this link for the S10/Camaro transmission
http://www.inliners.org/Jack/T5tech.html
