the s10 frame from 80's to late 90's are close to be the same, but you will need to look for a reg. cab long bed. It has about a 117" wheel base, your truck is I think around 114" wheel base.
For my cousin's 50 GMC I placed it on a 98 s10 reg short bed and it is about 109" wheel base. He planning to shorten the bed.
The s10 frame is an hour glass shape so triming will need to be done if you want it to sit low for you truck, cause the frame is about 43" wide at the front of the cab.
Also, you will have to measure the width of the front suspension and compair it to your truck cause your truck might be wider, was told there are some billit wheel spaces for that and for the rear you will need to find the 4x4 s10 rear axle cause it is 5" wider than the 2 wheel drive.
I got the info form this site:
http://www.ad-engineering.com/HOMEPAGE.html
under (kit components)
hope this helps
was also told that the dakota frame has a better width for old trucks but not sure if the 6-lug pattern is the same as chevy (early dakota's had 5 lug same as ford 5 1/4.)