It's been a number of years since 'HP' disappeared from our snowblowers and lawnmowers to be replaced by 'cc' and torque. Doesn't help me if I'm looking for an engine for my 8HP blower or 3.5HP mower!!
Here's our version of Harbor Freight.
http://www.princessauto.com/en/b/driveline/driveline/power-equipment/engines/engines/N-syhaor
I always enjoy seeing their work. I just wish there was more of it!
Also, please, a bit of info about the rear axle you use.
Another Japanese import?
Got a link to the hob installed? I don't think we have any hybrids here.
I (personally) feel that it's the MH Manufacturers frame extensions that are rated at 0lb.
The 1-Ton SRW had a GCWR of 8500lb. The 1-Ton DRW are just as strong (IMHO). YOMV, of course.
-37F is fine but only part of the story. There are other properties in an antifreeze (corrosion inhibitors, etc) that might be depleted. If you don't know your coolant's age, it might be a good idea to renew it.
I think one reason they're still around is that a lot of people find it more than convenient to use one fuel source for their fridge, stove and furnace.