First.. Welcome Aboard, it's good to see you here, but then I noticed your join date... You been lurking all this time?

In regards to your frame question.. If you use the S-10 frame, you'll still need to cut / slice / dice and make it fit. Then, if and when you decide to sell it, alot of folks will turn their nose up at it...

So you'll be back at square one with a S-10 (sort of) frame made custom.... If it were me, I'd search out an original and then modify as needed if your inclined to IFS and / or IRS...