Will do. Another question. I have always seen the compressor cycle. Is it possible, with temp, humidity, and this is not a standard system, could the compressor not cycle??

1990 K1500 Chevy. Replaced R4 compressor with Sanden 508. Used Red orfice tube. All other parts are the original parts. Pulled vacuum for 45 min. Put in 3 cans 134 (original R12 says 2.5 lbs=40oz, 3 cans =36 oz). Compressor comes on and wont shut off. Outside temp 79-83F and estimate humidity 60-70%...