Ok, found a nice lightly used 60" deck yesterday for a smokin deal, missing the front linkage and had some chewing on belt from rodents. Ordered set of some mulching blades off Scamazon. There was still some original factory paint on underside of deck. Greased it, added some gearbox oil, didn't sharpen blades at this time. Took my 54" deck off. I put bolts in the back carrier brackets on 60" the same height as the ones in 54' deck. Got the deck mounted up, only had to adjust nuts on front linkage slightly. I knew wheelbase on 1870 is about 3" shorter than the 2370. Turning right full lock no problem(about 1/2" clearance between tire and edge of deckl, not so much when turning left full lock when deck is lowered. I put the turf tires back on front, still hits left turn fully. I ended up turning the steering stop nut on left side almost out fully, and that gives me a little more than 1/2" clearance between tire and deck. Feeling confident, mowed the lawn. The 1870 handles the deck with no problem. Left turns have a wider radius, but got used to it. I was surprised how much time I shaved off my mowing time with the extra 6" wide deck. Lawn takes 1-3/4 hours with the 54" deck, with the 60" deck I was done in 1-1/4 hours! I am super happy
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