Okay, this is what I have put together for the t-350/to whatever x-case. Chevy uses a 27 spline shaft on the t-350, so you can do several things: 1) use the chevy adapter, wich, by the way comes in different thicknesses, and chevy t-case 2) use the chevy np 208 adapter, jeep np231 t-case, and the input shaft from an s-10 np 231 3) use the t-350 with a cutdown 2wd main-shaft to fit the length of the s-10 adapter, and then use the s-10 t-case. this one is a little bit of a pain because gm never offered the t-350 in an s-10, but where I live s-10's are cheap, everywhere, and so are t-350 cores. The adapter for the s-10 is thicker than the normal adapter by almost two inches, and only uses FIVE studs to hang the case, not SIX, like everything else. The s-10 t-case is still an np 231 so all the goodies still fit: SYE, 2wdlow. But the Dodge 241 gear upgrade will not because of the input spline count, sooo pick your poison. ME, i will run the s-10 stuff until it blows, then get another for about 50-60 dollars, and do it again.