no high pressure rv2 help!

OK, first, there are only so many service connections on these vehicles. Second, unless it is overcharged to such an extent that there is insufficient volume for vapor pressure, the static pressure will follow the pressure / temperature curve of "saturated refrigerant." The only time the pressure will be BELOW saturated press/ temp is if there is not enough liquid in the system, and likewise if the pressure is ABOVE saturated press/ temp, then there is so much liquid that the refrigerant can no longer expand.

The readings he's getting tell us neither of this is true. R12 press/ temp for a 70* F garage (static) is gonna be about 70 psi -- just what he has at rest.

This is typical of a failed TXV -- a leaky temp bulb/ diaphragm

http://www.central-air-conditioner-and-refrigeration.com/thermostatic_expansion_valve.html