Mate if mine did a manual conversion in a vr wagon a few years back... Told me
he'd never do it again haha
after buying the gearbox, pedal box, computer you also have to look at a clutch, flywheel, whether or not you want to keep it vs and go hydraulic actuation or cable as in the vr backward, then after that, is the tailshaft the same length/ same uni's? Do you want to replace the whole wiring loom or just bridge a few wires in the plug that went into the auto? Also he had to get his speedo fixed, he bought some sort of aftermarket corrector for it..
Not trying to be the bearer of a head f@$k or be a c&@t but all things have to be thought of before embarking on something like this... My mates vr was off the road for about 3 months... Then when he got it finished he discovered the rear bearing had packed it in.. More money gone poor bugger.
That said.. After all thi gs sorted out he was happy, manual commodores go hard
EDIT: t5's are cable clutch, getrag's have hydraulic... If I'm wrong please correct me but I think that's the case.. My bad