I don't know what to tell you but I used a Mopar 337 intake but used a 4150 carb. And 337 intakes are hard to find.

If you got the room the 2" 4500 to 4150 adapters work well.


67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......