How are those different from the standard 273 manifolds?
Regarding the steering: In 1967, the K member, tie rods and center link were redesigned. The center link cleared all factory engines from then until the end of production in 1976.
Lots of development through the long run of the A-Body steering, brakes and suspension.
It's not whether the ex. mans. are from a 4bbl or 2bbl (BTW, they are the same), it's whether they are 1st gen (pre '66) or 2nd gen and up ('67 and on)...those 2 are different.
