I had a 61 "LandCrusher" back in '90, and it was pretty rough running. Bought it off a lot for $1200. Guy offered me that soon after as he planned to drop a V8 of some sort in it. I dropped a valve about a year later and located the guy who wanted the swap and he gave me $1200 as is. Found out later that he got too busy to do the swap, and he pulled the pan and conn rod (and I assume the piston) and was driving it as a 5 cylinder. He said it ran "a little rough".