Hud, I remember seeing a Montgomery Wards tractor, years ago, with a Dodge engine. It was powerful and you could get parts at any MOPAR dealer. With dual straight exhausts, it sounded great, too! I know where a Dodge 230 is for sale, cheap. I thought about buying it and rebuilding it for future use. Didn't know what is the way to go a warm, but not wild, flathead six, though.
I have a 12 Port News article about converting a MOPAR flathead to a 5-speed.... looks like the way to go.
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El Plymino....that sounds interesting! I assume you've made an "El Camino"-type of a vehicle out of a Plymouth. Just the kid of thing that I like! Got any photos?
I recently bought a pair of those carbs from Tom and put 'em on my Chevy II four-banger powered Model A. I built my own water-heated intake and headers and, with those carbs, it is one SWEET machine!