Denny,
You asked what I thought of the 582 on the sled.
I picked the wrong gear for the track. It was a super grabby high traction track, but having never pulled that sled before, I chose 2nd (19T), hoping that momentum would help get me further down the line and provide some "friction pulling" late in the pull, possibly keeping it from just plain old spinning out. That didn't happen...instead I was hooked up rock solid in 2nd and the weak link in the whole set-up became the clutch. It started slipping about 2/3 of the way through the distance I traveled and when it got hot enough for me to smell it slipping I pushed in the clutch and called "no-joy". I couldn't see any use in glazing up a clutch just for the heck of it.
The 16hp had PLENTY left, really didnt seem like it was lugged down much at all considering the load on the tractor...clutch took most of the abuse. Had I hooked it in 1st, I'm sure I would have been able to use more of those 16 ponies considering how well the track hooked, but I didn't try it (not wanting to kill a perfectly good clutch).
8.50 Stones did a great job hooking up!!!
Tractor with me on it should have weighed 1105# "by the books", FWIW.
Plowing:
The 582 did just great, plenty of clutch for the load of a 10" Brinly and the 19T second really "walked the dog"...no power issues here either. I did want to jump out of 2nd under a hard load. I had never used this tranny under load untill last weekend, so it was 50/50 weather that was going to happen...It did, but not too bad...nothing a bungee cord couldn't fix.
Only issue I have with that tractor right now is the cheap-a$$ crank seal (flywheel side) that came in the Stens kit leaking. I have a Briggs seal to replace it with and stop the engine oil "seeper". Otherwise, I am well pleased with both the tractor and the Briggs motor.
Some day it might get a hyd. rear lift, but that's just because my modified 12" plow almost requires hyd. lift to get it out from under a full load of dirt on the moldboard due to the odd geometery of the high clearance frame....and I'm quite sure the tractor would handle the 12" in 2nd after it's performance last weekend.