If you're looking into an S10 tranny, the 88-up 4.3l v6 trannies are the New venture 15-25-3500's. I have the 3500 in my truck, and it's been excelent. they bolt right up to a small-bigblock chev. fit the 168 tooth wheel and 12" clutch and stagger bolt starter. and are compatible with one or two piece seal engines.
The 3500's are also found in fullsize trucks, that's a small testament to they're strength as opposed to a BW T5
88-95, NV3500 use a hydraulic slave-fork-ball pivot.
96-up use an integral slave/throwout bearing.
I run a clutch for a 77 chev 4x4 4spd, that has matching splines, and the right bolt pattern for the early chev 168 flywheel.
My 5spd has lasted 3.5 years of abuse and missed 6grand 2nd gear shifts, and outlasted 2 diffs and 3 clutches.
I think they're pretty tough.
though I don't have much horsepower.
You could try V8S10.org as they put many smallblocks in front of S10 trannies.
Hope this helps man>