I agree with the other comments - narrow ones turn better and with the same tires generally have the same flotation.
Could be me but feel the wide front is more stable - nothing to back it up -- just my feeling. I'm also not a fan of the center wheels when cultivating -- just like the rear wheels to follow the front ones down the row - personal preference
Also look at the 666 and 686 (Last of the M design) as I think the engines are better and the D312 doesn't have glow plugs. It will start really well in the cold if you have good batteries -- but your in FL so not sure that matters.
The M, Super M, Super MTA, 400 and 450 are probably only availabel in gas and not sure I would want then in Diesel. For the 560, 656, 666 & 686 you want to spring for the Diesel.
Hydro is a good choice for transplanting, harvesting and hey work as the speed is infantly variable and really slow for transplanting. You set the throttle (and PTO speed) they move the lever for the ground speed
Not so good for tillage as you loose too much HP to the wheels - you want the gear version for that. The super MTA had the option of live PTO (note that not all came with live PTO).
The 686 (gear) will handle a 3-16 rollover plow in clay soil and no problem with a 8 or 10 ft disk. Regular M will only handel a 2-16 trailing plow and pull a light 8 ft disk. Yes their are aftermarket 3 point hitches for the M but unsure if they are strong enough for a rollover plow.
They all can handle a loader but limited by the 2 wheel drive. later models are better with power steering and more weight.
Big difference in operation comfort between the M and 686 as you would expect. Power steering, better seat, ergonomics, and the natural progression from a 1930/40's tractor to one in the 1970's
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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