diacris

Ive got a 92 s13 with stock diff/axles that im wanting to swap my j30 diff into. I also have 6-bolt vlsd output stubs to put into the j30 diff so that my factory axles will be compatible. While the j30 diff is free I am going to shim it and put my r200 4.63 ring and pinion kit into it. Im wondering if any of you have done this and whether or not the r200 r&p kit will correctly work in the j30 housing. Im aware that I need to swap the s13 diff cover onto the j30 diff but not sure if this the best way to go about doing this whole thing.
Would swapping the j30 internals to the s13 housing be better than putting a j30 housing into my s13? Some have noted driveshaft length issues and diff bushing fitment issues, etc. The j30 diff is also missing an ABS or speed sensor on the snout of the diff, I have not yet confirmed whether or not this hole is connected to the fluid-holding part of the diff. Shim thickness suggestions are also welcome.
Helpful input or links to previous discussions with useful info would be appreciated.
Thanks