Any AC Techs

with r12 gas pressure equals temperature within a few degrees. A few more degrees difference with r134. The r12 systems aren't built to handle the pressures required with 134 thus the " less gas charge " solution.
I think if I did anything I would let just a tad of gas out of yours. If the high side falling to about 225 will let the low side down to about 46 you're set. If you have a very small leak somewhere ( who doesn't ), leave to lower itself.