Not a 'hot rod' (although they were at least powered by a flathead Ford V8!) - when I was a very little kid - circa mid and-late-1950's - my Dad had a WWII Canadian army surplus 'Universal Carrier' (aka a "Bren Gun Carrier") Ours was actually the later war-production MKII version, that used a 95 hp Mercury flathead, as opposed to the earlier, 85 hp. Ford-powered MKI version) The U.C was a fully tracked, open vehicle, sort of like a half-scale, miniaturized tank, minus the turret and powered by a mid-mounted flathead Ford, or later Mercury V8. The Canadian and Brit military used them in WWII for virtually everything - as light 'armoured personnel carriers, light artillery tractors, battlefield reconnaissance and communications vehicles and commonly, as a mount and a carrier for mortars, anti-tank guns and Bren machine guns. Until it broke a track and got permanently and irretrievably lost - first stuck and then sunk completely out of sight in a swamp and peat bog, miles from home. my Dad used it as a combination dune and swamp buggy. for tearing around on the rented semi-wilderness farm property we lived on back then. I was probably only 4-years old the last time I saw and rode in it and never thought too much about it again for years - until some time in the 1990's - some 40-odd years later, when I saw a restored Universal Carrier on display in a The Canadian War Museum in Ottawa. As soon as I walked into the room where it was displayed - before I saw it or even knew that it was there, I instantly recognized the unique and quite pungent semi-sweet, semi-sour 'combination "gasoline-oil-canvas -dust-and-sweat" fragrance emanating from the machine as being that of U. C, and the memories of my Dad's U.C. instantly came flooding and filled my head. Strange how that works and how powerful the sense of smell is for triggering old memories.