Problems with A/C

Not an a/c guy but I have messed with it. Low pressure looks a bit low to me. Last one I messed with I also put a high pressure cut out switch on it. I replaced the condenser with one that had bigger tubes, a/c guy told me to do this when converting. Last thing I did, and it helped a boat load at idle and lower speeds was to put a fan in front of the condenser. I used a Spal. Without vent temp was in the low low 40's (110* outside) with it would blow in the mid-high 20's (110* ambient still)........made that regular cab Ranger like an ice box. Fan was a bit obnoxious noise level wise but.....