Just behind the front wheels you will see a cupler, after removing the shifter from inside the bus 1 13mm bolts remove the front pan 4 what ever someone used when they lost the original 10mm bolts. Undo the cupler and slide the rod back it sits on a pin under the shifter.
Hope this helps Bart I have a 67 westy as my daily driver /shop vehichle
Mario Vintage Werks restorations