So now that i got my car back together i want to get my AC working.
I have had everything in the car or shed for at least a month.

I was thining of spraying everything with brake clean then useing my air compresser to blow out anything that might be in the lines.

Should i replace anything besides the o-rings? the drier maybe?

 

I would NOT recommend brake clean for flushing out the lines...... Brake clean will damage the inside of the hoses.... Use only A/C flush....

If compressor is OK, then I would suggest the dryer(accumulator) and expansion valve/orifice tube.... And yes a seal kit...