Dual quad 340 intake manifold with carbs and new, A body SS headers

For the last time: Set-up came off a RUNNING 340 engine that I took out of a 67 Barracuda S that I recently purchased to restore to it's original condition with a Commando 273. Intake will only work on my 340. There is no way it will fit on any other Chrysler 340 ever built.
If A=B=C then A does not equal C