Don't know why the head pressure wouldn't be closer to 250-300psi, rather than 200psi, and hopefully it will somehow equal out. The spec for "Refrigerant Charge Capacity" for a completely empty system on my 96 4.0 is listed as 1.75 lbs rather than in ounces. Hope I did the conversion right by multiplying 1.75lbs x 16oz/lb = 28 liquid ounces. Added about 28-30oz to the system but may have left a couple ounces in the hoses. Going to recheck the whole system after driving a while.
Interesting about hosing the condenser down while refilling and had forgotten about that. One thing which worried me is when I shut the AC off then engine down I could hear a hissing coming somewhere near the lines/connections on the condenser. But I couldn't find any leaks and hope it was just pressure going though the lines, or maybe the orifice located there, because the condenser was so hot.
I'll admit I get confused on the way the manifold gauges work and figured later opening both H/L valves showing a pressure of 120psi on both sides told me nothing. I did just charge through the low pressure side and finally disconnected the the high side while stopping the 2nd can charge even though I had the high side valve off.
On the loaner manifold gauges I used to borrow from the local auto parts store there were no directions/user manual with them so I searched it out, printed it, and returned it with the gauges. Wish I would have saved a copy since my "Actron CP7806 Air Conditioning Manifold Gauge Set" came with no user manual and none available through Actron as can be seen below.
Thanks for the input a70eliminator and you've offered some real good advice a couple times in this thread!