Hello everyone, my name is Dan Millar and I am brand-new to the website and forums. I live in Seattle, and have driven trucks off and on most of my life. First big truck was a B-61 in central New Jersey hauling building products for George Schofield Inc. (see the photo attached) when I was 19. I am now looking for a completely restored or nearly fully restored H63. I would consider an H67 but really like the fenders on the 63. I intend to work the truck hauling loads, but not all that many days a month, and not really heavy loads. So I would like to ask a question about engines, and would be grateful for any advice and counsel. Can one install a 285/300 Maxidyne easily in an H63, or is a lot of modification necessary? Does the radiator have to be beefier for the 300 than for the 673? Does the exhaust system have to be wider diameter? I'll try to be a good participant in the forums, though my knowledge base is quite small. Be grateful for any help. Dan Millar millars@comcast.net tel. 206-390-1069