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Allan: Your quite right, 414 has 4.75 stroke, 436 has 5 stroke and 466 has 5.25 stroke. As I recall they all had 4-11/16 bore. Main differences were crank rod and pistons. Block was much the same. I may be bit off on this, just going from memory. However I like Randy, do not think it is impossible to get continuous 160 PTO hp from the 414 turbo version. As I said before my 1066 came from factory that way and was never tampered with on pump. Contrary to this we tampered with my 560 with 282 diesel big time. An IH technician had the 560 over 100 hp changing pump settings and moving rpm up to 706 standards . We settled for 90 as that is what I was striving for. The 560 pounded out 90 hp for 17 years and 11,000 hours. That is the only tractor I ever tampered with hp settings. I did it because the money was not there to trade for a 806 or 856. After I got the 1066, 560 was retired to silo blower duty. I still had to leave it at 90 hp so it could keep up with 1066 and NH 890 forage harvester. At 11,000 hours the 560 put two pistons in the middle of barnyard. I think this could have been prevented. Young lads were changing wagons at silo and left 560 running full throttle no load other than empty blower. I had a friend tell me his 1066 did the same on a blower. In my day I've owned 16 Farmalls, only one of those did not measure up to it's rated hp. That one was a 504 gasser. I will add that most exceeded the rated hp as they came from factory. I will give special praise to 560 and 656 diesels, in my opinion the two most efficient tractors I've owned. When those two tractors were my main power source the bottom line was the best. Now I also think there were other factors made the late 60s and early 70s good.
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