OK folks heres the deal: I sold a pair of thirds from my dads 40 to a 60 owner up there. Thinking they were late model 4:11 fine spline thirds............ Turns out they swapped late model axles under the 40. Then put early model thirds (course spline) in. I talked to the fellow I sold them to & I truly feel bad about this......NO WAY I WOULD HAVE DONE THIS FOR A SALE! TR (purchaser) said he will swap the course spline thirds & the 3:73 thirds for a pair of fine spine thirds for his 60 IF ANYONE can help with this I would truly be THANK FULL & repay you with some cruiser swag Please PM if you can help, be aware I'm heading to the Ozarks tomorrow so I maybe slow returning the PM's but I will.