No they were only checked on the dyno.
In the boat with my headers and my ignition box was the only differences my fuel pump also. 6.5 to 7 psi on the fuel pressure

The headers were pressure checked and were fine I checked them again after the incident still no leaks.

Unfortunately, a dyno pull, may not show a part throttle lean spot in the carb.

What carb do you have on it? I think the only way the A/F would go lean is if somebody played with the emulsion or the air bleeds. That controls the start of the boosters. Have you checked your fuel line from the tank to the pump?

you better put 02's in when you go back together, you might be surprised..I know I was on our setup...

Well finally went to check on my engine. Lifter stuck on the intake valve and the rest you can see. Checking their build sheets it appears the lifter bores were tight. So the human factor strikes again. The bores were measured and recorded and some how missed getting fixed.
The builder is stand up man and is taking care of it.
We had a good discussion about oil. No more off the shelf street oil for me. It was a brand name synthetic.

if it had a tight lifter bore no oil is going to fix it.

Yes my point exactly. My statement about type of oil was sarcasm.

the picture you posted shows a broken exhaust valve but you say it stuck an intake lifter in the bore.was the head also knocked off of the intake valve?

Yes both valves were broke. I did not take it apart. I borrowed a bore camera from work and checked it out before I took it to them. He told me the intake lifter stuck and started the carnage. They had to use a slide hammer to remove it.