According to this info, the RA60 has a different strut/steering arm bolt spacing to the XT130.
Assuming that info stands up, you will need new steering arms as a start. You can use AE86 ones with XT130 struts, but depending on your LCAs they can cause the brake disc to foul on the end of the ball joint/LCA due to the offset of the locating holes in relation to the centre of the ball joint.
Regarding geometry, don't quote me, but I am certain that I have read somewhere that the RA60 stub axle angle is out not correct for use in an AE86/KE70. Hopefully someone else can fill you in with more info here.