I have a 1970 727 transmission. for some reason I am having trouble trying to find a specific slip yoke that will fit. I have a 1330 drive shaft. Any help would be appreciated. Can some one tell me the difference between the 1966-1975 output shaft and the 1976-1993. is it spline count, diameter, I just cant seem to get a straight answer.

Thank you.

 

From what I have found, no one mentions a difference on the output shaft over the years....... No idea why they would be different.... Different size u-joints perhaps?

 

What 727 A or B? U joint size was bigger on some of the big blocks.