1fz turbo 400hp, 37” stickies.Yeah I would talk to RCV and see what they think. 32 spline is the next upgrade and from what I understand fairly easy. I know RCV has made 32 spline shafts for 80's. Just for reference what size tires and engine are you running?
Unfortunately being in Aus we don’t exactly have Dana/14 bolts at every junkyard. So kinda trying to run what I’ve got axle wise at the moment.
I’ve also considered as a science experiment throwing stock shafts in a lathe and turning down a taper/ stress relief behind the splines to hopefully prevent failures at the spline in the carrier