You should be OK however it will be a good pull with the load you have. The road was used originally for 18 wheelers hauling uranium ore so it is much wider than I expected and the switchbacks are not real tight.
I came down it in my Jeep Cherokee so years ago.
06 RAM 3500,Dually,CTD,Auto(ATS Stage 1),QC,4X4,PacBrake,Spyntec Freespin Hubs,60 Gal Titan Tank,EFI Live, Line-X,Torklifts and SuperHitch,Fastguns
2013 Arctic Fox 990, 275 Watts Solar, 2 Grp 31 AGMs
US Navy 1964-1968, 2-Tour Vietnam Vet