Q's reference to "Ain't gonna worry my Lord no more" is probably a reference to an alternate singing of the chorus. Whilst most people sing:
"Oh I ain't gonna grieve my Lord
Ain't gonna grieve my Lord
I ain't gonna grieve my Lord no more"

a few voices take a slightly higher line with
"I ain't gonna grieve, I ain't gonna worry
Ain't gonna leave this life in a hurry
I Ain't gonna grieve my Lord no more"

Nigel

You'll never go to heaven in a jumbo jet
Cos the Lord ain't got no runways yet

You'll never go to heaven in a limousine
Cos the Lord don't stock no gasoline

You'll never go to heaven in a Playtex bra
Cos a Playtex bra won't stretch that far

You'll never go to Heaven with curly hair
Cos the Lord don't want no cissies/poofters/hippies (choose one)there