A 890

Would like to use this road to go from Inverness over to the west coast, not a route we have ever taken before.

I have read an article on the road, not bothered by the single track sections, but it reports a 1 in 7 gradient , both up and down on the section between Strathcarron and Attadale.

Has anyone experience of this route?  We are towing a 1900kg  twin axle with a Volvo XC90, usually plenty of power.