A/C Charge by Myself

You need a good vacuum pump. I have no idea what you have, but if it's made for brake bleeding, it's HIGHLY unlikely to develop enough vacuum. You need to know how much refrigerant to put in. So you should have documentation on that. If not I'd contact the manufacturer. When charging, you want to get as much in "to start with" as possible. I always start out an empty system by liquid charging into the "high" side port. The compressor valves will prevent liquid getting into the cylinder. The liquid will "flash" through the system all the way around to the low (suction) side. Once this bleeds "in" then you can start the unit and finish charging CAREFULLY into the low side. Be darn sure you don't get any/ too much liquid into the low side of the system

You have a proper charging manifold? You need a way to monitor appropriate temps. A "good" system will have charts, temps and pressures to cover typical operation. You want LOTS of air past the condenser. If at all possible you want a "great big fan" into the front of the radiator.

You can download manuals for some of the Classic Air stuff from their site.....

Classic Auto Air - Air Conditioning & Heating for 70’s & Older Cars & Trucks.

This says only that 24 oz of R134 is the charge

http://www.classicautoair.com/manuals/1-1062Manual.pdf

They do warn that after initial charging, BEFORE engaging the compressor with running engine, that you HAND TURN the compressor 15-20 revolutions This would be to ensure there is no liquid that is "hydraulic lock"