ok, i have an 88 non turbo mkIII, and i needa recharge the freon but i cant find where to check the pressure and what not, i have the repair manual but it really doesnt help, if anyone know how to refil the freon in an 88 supra plz help me, thanks in advance, oh and by the way im new here so, hello everyone :D

I run a shop that does A/C work. Does your system still use the R12 freon ? Its very expensive here in CALIF. $85 per lb. Your car probably holds 1.5 lbs. It may be more economical to convert it to R134a ($210 total). That way, if there is a leak (and all cars will leak sometime), it will be cheaper to repair and refill.
Here you can only get the R12 in 30 lb bottles, and with a Cal. A/C License.
The "low side" port(where the freon is put into the system) is on the compressor. The high side is on the line. I would not attempt to fill or repair an A/C system without someone there that knows whats going on, as injury may result.