Well back when grandpa had it tuned they ran it on a 230HP dyno and it went past that number so they just left it! Not sure what it's still at because that was 30 years and 5,000 hours ago, but she's still healthy to say the least! It got a new head at some point and had some tranny/rear end work somewhere along the line but I don't know the specifics, it was all before I was old enough. It's a 1977 with 5400 hours. I'm a 1991 model year ;-)
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Today's Featured Article - Oliver 550 Purchaser Checklist - by Greg Sheppard. Pound for pound the 550 is better than anything I've seen. It has great power for its size and can really hunker down and lug. Classified as a 3-bottom plow depending on soil conditions. I personally don't think it can be beat for a utility tractor in the 40 HP range. They are extremely thrifty on fuel, at least my DSL is. Most drive train parts are fairly easy to get. Sheet metal is probably the hardest thing to
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