(1) The Georgia Yellow Hammers had a much simpler chorus: I'm S A V E D, I am, I'm S A V E D, I'm sure I am, I know I am, I'm S A V E D.
If you're trying to get people to sing along, that chorus is a lot easier to learn.
(2) Mike Resnick, of Ben Borscht and the Beats, had this verse which he said he didn't write, but knew from NYC circles: I know some folks who S M O K E and also chew They say they're C H R I S T I A N S too But when to J U D G --M E N T they go The J U D G E will say "Smokehouse down below"
(3) COmparing the Blue Sky Boys recording to Karl and Harty, it's pretty clear to see where they got it.