67 383 Dart

I will have some pictures of it this weekend, It has 3:55 gears, I have some diag to do for sure but I think it's the cam and possibly the heads also.
Like I said the car ran like this after he got the engine rebuilt so someone didn't do something right. I think the cam is off enough that it runs but barely. If the guy put on open chamber heads 88cc that is enough to drop 1 point or more of compression ratio, like 8.7:1