Quote:
Originally Posted by SS5150
407s were great but the 361s lasted a loooooong time. Uncles had 3- 806s/1-1206/1-1256. I liked the 1256 the best, but 2 of the 3 8-0s are still working and the 1206 could be made to work again without much effort. 1256 went for parts years ago. Extra torque is nice though....and 407s sound better too
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Hey Brian!
The 361'S were a fantastic engine as well. But if you have ever had one apart, the 407 was very similarly made, but heavier. Larger wrist pins and crank journals, piston cooling jets bigger valves.... but in construction very similar. I don't know that the 361's lasted any longer... Both engines are dry sleeved, and difficult to overhaul correctly. There are key things you have to do, or they would fail out the gate. Lots of them locked up on dyno's during break in because they weren't properly overhauled. Some IH dealers refuse(d) to rebuild them. No one knows how, lol. I had an old school IH tech I've known all my life teach me how. Guy is a legend. He designed a lot of engine techniques for turning IH motors into pulling tractor engines. He was one of the first guys to get an M up to 100hp, and one of the first to take a DT466 to OVER 600 cubes!! I called him the other day. I need to go see him. Said he had a bunch of Cub stuff for me, lol.