72 c10 Factory Air Conditioning Advice Needed?? Not blowing COLD!

[dlct3]

Ok, so here's the deal. I'm trying to get the factory ac working again.
Here's what I've been through over the past couple weeks and info regarding system. I've replaced the compressor with a remanufactured one, new a/c expansion valve, new R134 updated POA valve with clutch switch kit, 134 fittings, new control cables, all flaps working properly, new vacuum lines, & the condenser is flowing. Also, when I replaced the compressor today I looked to see if the bag had busted in the filters looking for little black pieces and found nothing which would make me think the condenser is fine. Just cant get it cold. vents say about 78-80degress maybe slightly colder while driving, but not under 70ish. Also, tried different lb amounts ranging from 2 lbs to 3 3/4lbs as recommended from factory (which makes the compressor knock slightly and sweat on the outside of the compressor itself)
Hope al this helps. Someone cure my woes!!

Thanks