Ok here is a little more info from the '84 Warn catalog, Hub service kits and what hubs they fit. Those in bold are known IH labled aplications M251 is unknown application, the others are Toyota. The drag shoes are the same amongst the IH applications though the nuts are a 3 different dia so the other kits MAY be a source of drag shoes for IH apps Kit #- Hub #s 7303 10 spline: M3, M6, 27 spline: M178, M196 IH kit# 465 830 c91 7304 19 spline: M10,A,B,C,D, M15, ??spline: M31, 10 spline: M208 IH kit# 465 831 c91 7306 M84 7312*19 spline: M75A,B,C,D, M90 A,B,C,D 9452 M240 9497*19 spline: M75E 9502 27 spline: M241, M242 9763 M251 Note this is a service kit interchangeability the M3, M6 for example are S80/800 while the M178, M196 are SII, some different innards, some same innards, same gaskets, shoes, ect so they are a valid parts source for each other for some parts. As far as I can tell M240 and above are Automatics the others Lock-O-Matic. Though not really part of this discussion, here are Warn hub kit#s for the manual hubs again known IH labeled apps and kit # are in bold. Kit #- Hub #s premium 7300 10 spline: M54, M154, 27 spline: M195, M204 7301 19 spline:*M167, M169, M198, M198A, M203, M203A, IH# 465 828 C91 7302 19 spline: M166, M168, M197, M197A, M202, ??spline : M229 7307 10 spline: M1, M2 7308 19 spline: M5, M7, IH# 465 833 C91 9547 19 spline: M198B standard 9590 M243, M245, 27 spline: M244, M258 IH# 577 227 C91 9780 10 spline: M252, M252A 11967 M246, M247, M248, M249, M268 10 spline are S80/800 and jeep applications with the exception of M208: jeep 3/4 ton D44, 27 spline SII and CJ, and 19 spline FS D44's external and internal* Again if anyone knows the M# for any other of the IH labeled applications or has the IH service kit #s please let me know so I can add it to this list.