What's the difference?

I'm not sure when EGR came into effect for all the US, but the first couple of years Mopar implemented EGR, there WAS NO actual control valve. You can only "tell" an early EGR equipped manifold by looking down to the floor of the intake through the carb mount. Ma simply "drilled some holes" in the bottom of the intake, allowing exhaust from the crossover to leak into the intake area.

Later ones, of course, had the obvious EGR valve on the rear corner.

http://www.forabodiesonly.com/mopar/showthread.php?t=162760

This drawing is out of the 72 shop manual

After seeing 67Darts image, I'm thinking I'll need an iron intake off a 340 if I want to run my motor with a factory intake that is Non EGR.
Does anyone make an aftermarket intake that when painted will look similar to a factory intake?