With all the issues you're having with mating up a bunch of parts, you might be wise to take a deep breath.....and scout up the correct transmission to go behind a 350. It being the Camaro box that came behind the 305 in the Camaros. It requires no adaptor, no shaft cutting, uses the stock Camaro clutch disc with the 350 pressure plate and throwout bearing, also running the mechanical speedo and the gearing is far superior to the S10 box. I'm currently running this setup with a mechanical clutch linkage behind my built 355 in my hot rod. However, there is one little hitch.......the Camaro T5 box has the shifter forward so you have to swap out the offset Camaro T5 tailshaft for an S10 mech speedo tailshaft and change the shift fork mechanism. Sounds complicated but it really isn't.....check "Hybrid" T5 in the Tips section. I just picked up a cheap worn-out S10 T5 for the necessary parts. The only real big issue is relocating the S10 speedo gear to work on the Camaro T5 box......you'll need to purchase a 3/16" ($8.00) cobalt drill bit but the mods take about 30 minutes...the hybrid box bolts up perfectly, the clutch disc, pressure plate are standard Camaro parts and you'll be ready for some great mileage......I'm running a 3.73 R&P and the SUPERIOR GEAR RATIOS in the Camaro box gives me a decent 1st gear and plenty of top end. The short 1st (3.76 or worse yet 4.03 in the 4cyl box) gear in the S10 box will be a real pain-in-the-butt with a V8. I'm afraid that after you get all the parts rounded up you'll be disappointed in the performance and have a lot of money and time tied up in a transmission that doesn't fit your needs.
Hope this helps....
Dave
