Are not 76-78 axles longer than the rest? AFAIK the mini truck hub bodies are all the same length, solid axle or IFS. Maybe you need the silver faced hubs from a Pig?
Also the clip in the end of your axle on my truck is right up against the inner sleeve of the hub (what a PITA to get that on, I have to use a cheater bar). That seems to me to indicate the hub is too short, right?
'91 Pickup - Imelda / '08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'98 Rhygin Juke SS / '12 Gunnar Rockhound 29 / '16 REEB Dikyelous
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein