I just purchased a new under the floor power brake unit for my 46 Chev 1/2 ton with S10 front end and Nova rear end and I will be installing it with new brake lines etc and was wondering other than the 2 lb residual valve for the front discs and the 10 lb for the rear drum unit is there any other valves or items I need to install. I see there is a manual valve for setting the pressure for the rear brakes on the market to keep them from seizing during hard braking and was wondering if it is really required as this is a street rod and won't be going to the drag strip. Any info would be appreciated. Bob T