Intake casting numbers

Lol, nothing would surprise me at this point. You all pretty much know more about my engine than me at this point. I'm almost hesitant to do anything to it, because by some miracle the thing actually runs pretty well. It all came with the car, so I haven't changed a thing. The whole car seems like it was just a junkyard dog in that there pretty much isn't a single part on it that's original aside from the vin tag, and at times I even wonder on that one, lol. By the vin and what I can make out from appearances it was originally a /6 and I'm guessing auto since a tunnel was welded in (poorly), but it has obviously since been changed. My main concern was whether or not the intake was really a 340 or 360 piece. I'm fairly sure the heads are original to the block (they're some 73 318 head, don't have the numbers in front of me), so I was curious as to whether I might have had a port mismatch.