Despite eveyone saying the split case toyota box is a good one my mechanic disagrees
He was a Toyota mech in the era of the TA Celicas and he says if you put more than 200 flywheel hp thru them they tend to break 3rd gear.
I'm contemplating going to another box (maybe even a cast case 5 speed as shown) for the supercharged engine for piece if mind.
I've already had to rebuild this T50 twice since I got it (about 100 trackkm or less)

So might have a rebuilt one with bellhousing,clutch,flywheel etc for sale in about 6 mths