[wwest]

WA mountain passes in the wintertime in my '78 Targa often required FULL heat, enough to drive you out of the car absent lowering the windows slightly, in order to keep the windshield interior surface defogged. And IGNORE the fact that you have 1st gear.

My rear heater blower is modified to increase its efficiency, there is no engine flow bypass as in the factory design, that helps.

Oh, the last Cracker Barrell heading west is in Missoula, mile marker 102.