Ford Sterling F250 F350 Forged 1350 series yoke  a 1350 u-joint is 3.625 wide 
This is the correct yoke for the 1985 - 1992 with the shorter through hole length of  1.262   (spline length)
if your yoke has the through hole length of 1.640 you need the 1993 and newer yoke.
We offer both so check our store if this is the wrong yoke for your Ford.

Or send a message we will get you the correct yoke u-joint size and through hole length.

3.625 between the tangs on the yoke that center u-joint.

Works on 1985 - 1992 as a stock replacement for the 1350 yoke.
Same as Ford part number E7TZ-4851-A


measure your yoke 

1350 is 3.625 wide  cap 1.188