... I agree with Outlaw. My experience was also that these templates were "rivet align". Meaning drill out the existing rivets on both sides of the drive shaft, where applicable. Of course chaincase off, speedo housing off, drive shaft out, etc... I believe the 5/8 template was only to rotate the drive shaft down and back and leave the jack shaft alone. Align the template to the rivet holes via some alum rivets. Mark the center of the hole that you will be hole sawing (it's on the template) with a sharpie, punch it, remove the template. Attack with appropriate size hole saw.
The template may also have the needed rivet align for the other side of the drive shaft, else you need two templates.
VA should be able you with pics?
That's the jist of it... good luck