I'm not sure how much oil goes in a 210 car, but I would definitely not put in another 4 oz. I doubt if it takes over 8 oz. total. Steve Brotherton pointed out one time that not enough oil wears out compressors but too much will destroy them.

The pressures will run different without ram air. You really need a pressure/temperature chart for that particular car.

I would recommend that you call Mark McCain at McCains and tell him what you did and ask his advice. He is always willing to help as long as you buy your parts and stuff from him. When I'm working on a car with which I am not familiar he will look up information and share his experience. He is what makes McCains the great shop that it is. He's a great guy.

Good luck,