The truck 12 bolts will work with a different bearing; I have a set of 2.49 out of a truck set up this way. Because I am running a 23” tall tire I need to be around 2.18. I heard that some Cadillac’s came with this gear. If I cant find the gears I will have to make my own rear end to get the tall gears I need.If I do that I can gol tall as 1.55. I already did the drawings for it, but want to find something off the shelf before building it.