Roger;
These do look nice, the gov, doesn't skimp on the power so they're gonna be loud.
With this unit, you should be able to make use of waste water heating as well.
Careful of the pressureized cooling system, if these are still the ones they used back in the '70s the pressure is up around 22lbs and the caps always had dry-rot problems when we serviced them. That of course was back when real rubber was used not the great ploymers they have nowadays.
The glow plug can give you problems as well, and watch the polarity of them, the 21/2 tons where positive ground!! while the 5tonners where normal neg ground.
Would like to know if these are alumimimum with cast iron sleeved or solid iron.
The E-bay weights indicate they may be Al with sleeves.
Mountian View -wow, spent many a summer around bull shoals back in 6th/7th grade.
Wife's family had 100 acre farm, I know a small one :--), over in pocahontas until just a few years back.
Wonderfully quite place back then, lots of Kudzu too...
let me know how those work out.