500kw on the street,,,, not too sure they would hold that on a prepped track.
I think your asking about the tranny mount that comes in the JTR kit??? if it comes with one and you use it to mount a TH350 then mount the rb26/25/20 (all teh same adapter) to teh tranny you would more then likely need custom mounts for the motor.
As for the glide. the only reason im running one is to maximize the hp output to the rear wheels. Its light, requires less power to turn ect ect. But in my application with a 5000+ stall driving on teh street will require a huge tranny cooler to keep temps down.