For unknown reasons my 1971 240Z started having issues of not accelerating after 4,000 rpm. It revs just fine when not under load.

I have checked and double checked the carb settings. I replaced the coil. I checked point gap. I replaced the fuel pump and blown out the fuel lines plus replaced the ones at the rear by the tank. I am beginning to think it is distributor related.

Is there anything that you all can suggest I look at/check while I have the distributor apart? Any other suggestions regarding distributors?

Edited 10 hours ago10 hr by Galaxybj
added info

You should be able to check the distributor with a spark tester. I'm not sure if they would be on a "tool loan program"? Here's a tech tip that shows what I'm speaking of.

https://www.atlanticz.ca/zclub/techtips/distributor/index.html

That could also be low fuel in the bowls. You can check that with clear tubing, very easy.

You could rule out in tank problems by rigging up a temporary fuel source with return lines