I like your cars alot. I am a huge fan of big block shortbeds, and your truck is right up my alley. As far as the motor, it looks great now as it is. If your intent is to make the truck a resto rod, then put the stock stuff back on it. I personally believe that the blue engines really work well with chrome accents. Yours has just enough to not look too flashy.
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Ford Quadricycle Specifications