This should be labeled abuse

When I was a teenager in the 1950s I knew of one only SM, 6 MH 44, about a dozen Cockshutt 40 and 3-4 Oliver 88. The guys that were buying those tractors bought them for one reason,"PERFORMANCE". The IH dealer in that area had probably 80% of smaller tractor business. Not so in the 50 hp class. 6 cylinder was king.

Actually the smallest silage box I ever had was a 16 footer and all self front unloaders. We managed to get those the barn with the Farmall 300, now I will admit we switched to 656 quite quickly as soon as it finished haybine duties and on corn we always used 656. I don't know where you got the idea of me using an H for this. My H was long gone before I started silage in the mid 60s. My last silage carts were fifth wheel highway trailers. We used them behind tractors and harvester with tow dollies normally used for making up trains on highway. Most of them were 24 to 30 footers and we moved them to silos with a highway tractor. Farm tractors are to slow, in this day and age. I lived on a heavily traveled truck route and there is only one way to fight truck traffic, that's with a truck.

As you can see I am a Farmall guy pretty much all the way. I don't know a lot about those old MH and I guess your suggestion on 6 cylinder actually being 444 is probably correct. And don't get me wrong I don't believe any of the 6 cylinder competition the SM had would run away on SM under same load. They were however tough competition.

If you go to tractor pulls today antique classes, and most of SM's competition is 6 cylinders. They are not leaving the SM in dust or anything of the kind. They are tough competition though. If I were in a pull today with a SM the one I would fear the most is the Cockshutt 40.

My 560 did not have a turbo, we managed to get that hp out of it without. I did this very early on and ran the tractor that way 17 years 11,000 hours. It had pistons and sleeves at 7,500 hours. At the 11,000 mark on blower one day the old 560 gave the boys at silo a shower of engine block, rings, pistons, sleeves and oil. When the dust settled there was parts 30' from tractor. I sold the 560 to a guy for a puller. IH wanted $4,000. for a short block and I couldn't see spending that kind of money on a tractor without 3 point hitch.