has anyone fitted a supra 5 speed behind a series motor , how much tunnel work is there ,and fitting it to motor

T50 celica yes
W50 Celica... pending
Haven't tried the supra box in the tunnel... have one I could have a go and see
You mean a W56 style ?

I've converted a supra style box to fit in my 1200 coupe behind the A series but not yet fitted it to the car. I posted some stuff about it and I don't post much so it won't be hard to find. Essentially I cut a bit off each bell housing and put a 12mm plate in between since the sizes were quite different. I used a mandrel in the main bearings to align it all and refaced the bell housing surfaces on the mill after welding. If I were doing it again I'd probably allow 1.5mm for facing after welding, it's surprising how much distortion you get.

I still have not modified the flywheel or figured out exactly what to buy for the clutch actuation. Planning on using a CSC even though I left enough of the supra bell to use the standard set up. I have to convert the whole clutch actuation to hydraulic. Not sure if I'll finish it this year.

I have t50 behind the motor now but i'am getting worried about not handling the hp the motor developing at the time ,I have step it up more with more development in ECU and throttle body work