65 4 speeds last year for B&Ts.Autos had slip yoke.Mine has been in since new.Broke many rears but the front is still great.My 440 has 600 HP now.Even with slicks never broke the front.My kid ran B%T in his 62 300 for 3 years and beat it to death.I think I still have his shaft in the garage He went to nes style trans from Cope.As long as they have grease and sealed they last Oh yeah my 57 had the OE one also.I did replace the torn boot on it.All 4 speed came with B&T till 66 even maxies.Rocky