Vintage Air System Problem

[gag1025]

We have a couple of ideas we are going to explore next sat. I am having my right knee scoped tomorrow morning and will not get back to the truck until next Sat. I had the left one done 25 years ago. Someone asked me if it was from playing football, basketball and baseball (catcher) through high scholl and college. My answer was that it probably came from helping my uncle who was a roofer (I was a go for-go for this and go for that) for 6 or 7 summers after college working part time. It came from climbing up and down an extension ladder with a couple of bundles of shingles slung over my shoulders. Remember back in the day we did not have lift trucks and conveyor systems. The only way up and down was that ladder. I will let you guys know about our experiments only if they work. Otherwise I will use the original vents.