Well I just put a set of FJ Cruiser steelies on my 1977 FJ40. Had to use spacers to have appropriate back spacing, but the OE wheel studs are just to short for me. I have searched for several hours three separate times with no real answers. I also check FAQ twice for any direction. To no avail. I see that the knurl is .550 and the stock length is 37mm (1.46”). Some suggest the 45mm (1.77”) off of the FJ60 or 62 I can’t remember which now, but I need a solid 1/2” minimum increase for it to be correct. The knurl seems to be my limiting factor, which may need to be fixed by just drilling out my hubs and axle. I know some of you don’t understand why I would even put a wheel that needs a spacer. My apologies ahead of time for that. Thank you all for any part numbers or direction you may have. You guys are the best!!!