Chevrolet Repair: air condition won work, cluch, ac compressor

Question
I have a 1994 chevy full size 2500 4x4 and the ac wont accept a charge the cluch is engaged and some freon does go in but wont coll what should my low and high side press be and could there be a blockage some where my pressures now running are60 to 70 low and 300 high  i know something is wrong can u help me thanks.

Answer
Hi Dustin.... i don't have those specs right handy here but your Hi side is way too hi....try bleeding off some of that pressure,if your AC compressor is running you have enough in it to make it run as the low pressure switch would shut it down if it was too low...you may just have an air lock in the compressor. i will look up spec and sned later...hope this helps