Power steering for my 1966 plymouth Valiant 273 V8

The pitman arm is the same between power and manual steering. If you're wanting it to look completely stock, the factory setup from a '64-6 is what you want to find. You can keep your steering column and just change the center shaft with the P/S version with it's coupler. You will also want to find the correct 90 degree pressure hose fitting for the control valve which only came on the V8 cars those years. Stock hoses are available when I bought mine a year ago.