We bought a K-car from a rental company in 1985. Drove it from Florida to Utah with a full trunk, our two daughters in the back, and a roof rack for the reloading supplies the moving company wouldn't take. All went fairly well until we got to I-25 from New Mexico to Colorado, and then the Rockies to Utah. Car could not climb hills with the A/C running - and it was the end of July. Miserable two days, for sure. Truly crappy gas mileage with that roof rack, besides. It was tuned for sea level; the Rockies are not sea level.
Didn't take us long to trade it off.
