Pretty sure its the flywheel thats to big m8

Have read about this before,you have to machine flywheel down and fit a 2.0 DOHC sierra ring gear and starter motor

Thats assuming you are using the 2wd MT75 out of a 2.o DOHC sierra?????

Also how do you come off for space for the downpipe to fit past the clutch arm,cause its on the opposite side to the 4x4 MT75 and the 2wd T5 borg warner as used on YB sierras?????