Booked called for a 6PK1045 too short
Tried a 6PK1055 too short also
I fitted a 6PK1080 and it was perfect.
Iam not sure if it matters if you have a clutch pulley or not as they do look the same O.D.
maybe the parts book calls for the plunger type alternator mount , versus the serptine setup
I have seen motors with and without this alternator mount assy.
I have both types, and installed a serp assy.
GB