Drove the car to Yosemite for the annual telescope party at Glacier Point. Actually took the car for two days of mixed hi-way and mountain roads with some of the trip above 7000 feet. Since last year's trip we changed the front and rear sway bar frame bushings and ends pieces, installed a new Holley 80670 and some Pertronix ignition components plus a new Centerforce clutch. The car performed admirably not even complaining much at altitude, plus those mountain roads
Also averaged about 18 MPG at hi-way speeds with ~400 pounds of camping and telescope equipment on board. The Grande was packed to the roof. All this with a quench head M-code and toploader. It was a really fun trip.
mike