If it was an original 340 manifold the bolt holes would have been closer together than the W2. Holley did make a W2 Strip Dominator starting in the late 70s. Seems improbable that after sparing no expense on the rest of the engine he would go cheap on the intake. Probably only 110$ back then ?
Go back to post #25 - that is the box it came in. EdsWelding - I see what you're saying. Could be. I will know more after I can measure the deck height. Is there a way to tell how much could be shaved off the heads?