#1 --you will need to pull out and clean up your stock bus torsion springs.
#2 -- slide the drill jig on and line up the last hole with the spring-packs divot.
#3 -- use one of your beams 5 grub/set screws to secure the jig to the spring pack.
The Wagenswest spring narrowing kit, is designed so you can drill for either 2,4 or 5 inch narrowed beams. ‘SEE PHOTO’