no high pressure rv2 help!

Ok, the static pressure at 70f should be around 70 psi, and the system should equalize with the compressor shut down. 70 low & 70 high is fine.

Generally the system heating from underhood engine heat will hold the system temperature above ambient, and the static pressure will reflect this. For reference, with R12 @ 90f you should see 100 psi static.

You say you have 4 lbs in the system. You should see more on the highside with that charge.

do you have both valves closed on the manifold set while testing?

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