FYI - You do NOT want chromoly birfs, unless you've converted to part-time 4wd. Full-time will destroy them quickly.
I replaced mine with new Terrain Tamer birfs from George @Valley Hybrids (@orangefj45 on here) for far less than I expected.
Plus, he's about the only place I found with the correct ones for 91/92, so you don't have to change the outer flanges too. He also carries the later variants; depending on what year Cruiser you're working on.
@krs2fur I guess I should have given more details. I am on 37"s currently with plans for 40"s next year. This is not my daily driver and I also plan to do the part time 4wd