My 69 firebird convertible needs a new steering box, I was told that a 77 WS6 is a much better box than the one I have.. NPD has a fast ratio steering box for $280 that fits 77 - 79 and is supposed to fit on my 69 bird, is this good or can someone point me in the right direction.

Also I need a center link for the car, NPD part # C6870-1 is for a 69 camero, is it the same for the 69 bird.