Slant 6 A Body advice. Engine and chassis.

Do you have the link? I have a power steering gear that was rebuilt by Feel Firm for my 67 Dart Its okay but at low speeds it may as well be a manual gear! I understand that there is a give and take BUT I would prefer the power assist at low speeds. Worse yet the pump shudders at hwy speeds. I think thats my deal with manual steering.