Ok it ran perfect. Parked it for a week and them wouldn't start? Come to find out had no spark. I have a msd direct fire ignition so I unhooked that and went back to stock ignition and then I could get it to start.
I'm assuming the msd box took a crap? But that's not the big problem. I start it up and when you rev it hard it pops hard and sounds like it's backfiring out of the carb really bad.

Took a short video to show what it sounds like.

 

Check your timing.

 

That's what I was thinking. But how can the timing he off when I never touched it?

 

Ok I've figured out it doesn't act up until I open up the 4 barrels. But the carbs all rebuilt?

 

What what? You start the car with all 4 barrels open?

You converted this to mech secondaries im guessing?

 

Yes. It always had just a slight hesitation if you just romped on it due to the mech secondaries. But this is way different.