Ok, so just to make sure I'm understanding right (b/c I seem to be pretty dense about this)...
If you want to go up to 4.88, then ideal is to start w/ a V6 3rd that came w/ something else (say 4.10) and upgrade the R&P. By going V6 rather than 4 cyl you get the better housing/gears/ more spiders, but lockers would be the same either way.
Best in long run to avoid the V6 3rd that came w/ 4.88 stock b/c yer stuck/limited in it's upgradability.
Correct?

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
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'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah