I’ve bought a couple of the 68-69 340 intakes. Paid $100 each. Market not that big for it resto or stock appearing guys Not bad manifold just if you’re buying one, a new aluminum is much light and better performing.
The stock OE iron will perform on par with the likes of a Performer or Action Plus, etc....
The RPM or Stealth etc.... will out perform the iron only if the build calls for it.
The difference in power would not be felt. Additionally, the same for the weight between them.
It would show up on the track and I’d get only a 10th or 2 at best. Only you can decide if spending the extra money on your non racing car is worth it.
