Im stumped, It's missing and ticking.

Intermittent problems are hard to pin down - especially when you "disturb" a bunch of stuff and then the problem seems fixed. On your 3rd distributor? Probably not distributor related. Go over other parts of the ignition system and fuel system with a fine toothed comb.

Get the car to act up in your driveway (the power brake scenario - but in park) with another person present. See if the carb is dumping raw fuel like crazy. Try resetting the floats or simply lower them a little. What carb do you have on it right now? If it's a Holly make sure the vent tube that sticks up isn't covered by the air cleaner lid (I have first hand experience with that on a Vette). After it acts up, are the plugs soaked? - Check them all and make sure none have cracked insulators. If it was indeed the intake gasket the first time - maybe you blew it again.

On the ignition side, others have already mentioned cross fire problems. Make sure nothing is arcing to another wire or to the headers. When you throw a timing light on it, is it steady or erratic?

Stick with it - you'll get once and for all. Try to completely rule out one system (fuel or ignition) before moving to the other.