ac evaporator

I have a 68 Barracuda with factory ac, and I am running a Sanden pump and a new condenser, reusing the old evaporator and TX valve, and am running R12. I threw a little less than 3 lbs into it just this weekend, I believe the manual calls for 2 lbs 10-14 ozs. That is of course using the boat anchor of a RV2 pump. I wasn't sure if I should compensate considering the Sanden pump. Not knowing if the RV2 pump vs. Sanden would change the capacity needs up or down. Or whether the new condenser that I have is bigger or smaller than the original factory. Anyways, it's been too damn cold to really get a good read on the system. It was like 60 degrees yesterday, barley. My low side was a bit low in my opinion at 22, and my high side was only 135. Compressor cycles on and off. I just need it to warm up into the 80's to see if my pressures are in a good range.