Pinging on acceleration.

Okay, you have the old style toilet bowl BBD. That is intended for a 273, or 318. So it should have plenty of fuel. They run good on a slant. They are completely different on the internals that the newer BBD's. They are "air metered" don't ask me what that means. The metering rods are tiny diameter. I am not sure if they are adjustable.

There is ways to check the slack in your timing chain. One would involve pulling the valve cover. The other is popping off the distributor cap. Putting a breaker bar on the crank bolt. Checking for slack.

I actually had a 383 jump timing 25* on me back in the day with the nylon toothed cam gear. The teeth were gone and in the oil pan. It was eating into the aluminum gear.