[1 TUF AC]

I am in the process of collecting some parts to change my differential ratio on my Harrison. I have done a lot research and been to plenty wrecking yards and read this post at least a dozen times. The only part that I can't work out is what axles I need to buy!!! s13,s14 or s15 bolt six axles ?? I have GTS T rear end with a solid mounted 5 lug differential. I want to put a S 15 helical LSD with a 3.692 ratio. I know I need to buy a four bolt backplate and solid aluminium bushes to mount the diff. As well as shortening my tail shaft at least 20 mm to allow for the ABS sensor length on a S 15 diff. the only part I can't work out is what axles to get. I was going to buy S 13 axles but I read online that the GST t and the GTS wheel hubs have different splines. I'm pretty sure s13,s14 and r32 gts have the same hub spline but the GTS T has bigger axles because as the turbo model. Can anyone help