I remember seeing worn canvas covers and the chain scratching the paint.
I guess after time the truck got old. Fast forward in time, we are fixing today what was neglected back then.

Thanks but my wife and I ride bicycles for exercise. Changing out worn tires includes new tubes. I have enough old tubes to last me. Thanks again.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."