Questions Regarding 383 Barracuda Engine Compartment

The parts manual for 1968 lists the same left side manifold as 1969. PN 2946728 The date on the manual is March 1969, supersedes April 1968. Since this later manifold will fit both manual and power steering, it's likely the earlier number was discontinued.
The number for the '67 left side manifold is 2899001.