(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.