Bought the Chevy 3500 new in 2005, Featherlite gooseneck, used and abused in 2009. Haven't tried to fit my 80 inside yet as other projects are stored inside.
I did haul my 1975 C20 2 wheel drive inside so maybe the LC will fit depending on lift and tires. Would like to spray foam the interior then install a toy hauler interior, bed in the over hang. Heaviest load was around 18,000 plus truck weight. Hauled my 1995 Holiday Rambler 5th wheel from Elko, NV to Eastern Idaho, total weight across the scales, 25,600 lbs, full of fuel and me in the cab.