Just a FYI on T5's. Borg Warner made many 5 speed trannies under the the big "T5" family name. Even within the same applications there were many internal variations. There were T5's for Ford, Chevy, Nissan, and others I believe. All different. T5's for V6 Chevys are different than T5's for V8 Chevys, and different for cars and trucks.
Now, can you fab and mod to make mismatched pieces work? Of course, hey this is Hybrid, right. Is it worth it? You decide. I haven't even finished my car yet and I'm worried that 3 to 5 years down the road will I remember what parts fit.
For me I know that everything from the water pump to the driveshaft yoke came out of a '91 TA. Just the way GM put it together and warrantied it. It works.
I'm not ragging on guys here that are striving to improve there rides by putting together the best parts possible. I applaud them. The guys with hp numbers in the stratosphere have to do that. But you either have to know what you are doing or have enough green to afford your "experience" a.k.a. misstates.
This post strated out to be informational and ended up sounding like preaching. Didn't mean for that to happen. Oh well, hope it helps anyway.