I have a 1985 RX-7, 12a, carb, 220k miles, 5 speed. I am replacing the clutch slave cylinder and the rubber clutch hose but the fitting on the metal cluch line (from the clutch master cylinder to the fire wall) has frozen and I can't disconnect the metal to rubber hose connection. So I want to now replace the metal part of the line as well but I don't know what size metal line and what kind of fittings it needs? Any idea?