need stoner help from the 70's

looking for info on song possibly titled ;the great american smoke off; its a song thats in story form about two stoners who argue about being able to smokem faster than the other can roll them. the song ends when they run out of ;SMOKE; and the song end with the lyrics 'SO BEWARE OF BEING THE ROLLER WHEN THERES NOTHING LEFT TO ROLL' song is from the mid 1970's.

You were close on the title, it's "The Worlds Greatest Smoke Off " and the artist is Shel Silverstein from 1972 (I did not post the lyrics due some explicit language).