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Here is a rip on a postting Matt did back in 1999 that I saved just because it was useful information and you may feek the same about it too. Matt "Motec" is very very sharp on this sort of stuff! 605/800 cu.in. engines Posted by Marilyn Fellers on November 22, 1999 at 22:29:27: Need info on whether or not a 605 or 800 could replace a 504 engine - will it bolt in or not? Posted by Motec Engineering on November 23, 1999 at 08:18:33: In Reply to: 605/800 cu.in. engines posted by Marilyn Fellers on November 22, 1999 at 22:29:27: Maybe. Minneapolis Moline made motors with three different bolt patterns on the back of the motors. The R, Z, 335, 445, 4-star, and U302 all had a pattern that is about the same size. (small size pattern) The U, G (4-cylinder LP and gas), 5-star, M5, 602, 670, 283 and 403 power units have a common pattern. Let's call this the medium size pattern. The G-1000, G-900, Vista, and the AT-1600 also have the medium size pattern. All 6 cylinder power units (425, 504, 605, 800, & HD800) have a big size pattern. The GB diesel, GVI, 705, 706, 707, and 708 also have the big pattern. They did make a few HD800 motors with the Medium size pattern, but these were in the AT-1600 and sold as a power-up kit for the G-1000 or G-1350. So, a 605 or 800 power unit will bolt in a 705 without a lot of work. It will not bolt into a G-1000. A 504 motor from a G-1000 will bolt to a U transmission. The crankshaft from a 605 power unit will fit in a G-1000 504 crankcase. Good luck. Matt Motec Engineering
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