I have been given a Dresser Series 5000, S/N 4005X22583 compressor (less motor and tank). I am building a compressor unit for running a small sandblaster, but I need to know specifications on the unit above and what HP and RPM motor, as well as the size of the motor pulley (double pulley) I need to operate at maximum efficiency. Also, where can I get parts for the unit, as the reeds may need replacing? Thanks