power steering problems

I have a 1974 duster 360 with power steering. Originally was a 6 cly and the power steering was on it originally. Every since I have owned it (14 yrs) the steering wheel will automatically turn to the right unless You hold the steering wheel in place. I have replaced the power steering pump, the pressure regulator valve on top of the steering sector. still the same problem. I'm guessing the regulator valve on top of the steering sector is allowing too much pressure. Do I need to increase...

power steering problems
Author: big block