bck - are the air/fuel ratio's reported from wideband 02's are the dyno using the airflow vs fuel flow meters. Sorry if I missed it earlier.

Afr is wideband. There is no airflow measurement.

Do you have any pulls with either carb, atleast a few hundred rpm higher than what you have showed ? Just trying to see if any valvetrain instability or fuel supply issues.

I'd have to check. We might have made one to 6k, but that would be it.

here is my pull, Ryan pulled them slow and I did in full Marine trim as they are in boat, did you use accessorys also? marine exhaust?

We pulled mine to 5900 where rev limiters set..

pretty sure his build is very close to mine, he was supposed to give me cam specs but I never got them..
https://www.youtube.com/watch?v=KqmM7YHqnaE

SB- I doubt it's valvetrain problems as I'm using pretty decent parts and we've actually switched lifters and pushrods and still saw the same results.

Too bad he blocked me...

What valve spring setups are you running?

Something weird is definitely going on with that power band. Sometimes we tend to just look at HP numbers, without looking at the whole picture. To me, it looks like the engine is dying off way too early HP wise, relative to the torque band. I don't think its the heads holding it back thats for sure, I don't think its the dominator and 454 R intake.....

What ignitions do you have, and where are the rev limiters set to, if any?

Isky tool room. Crane HI 6M, matching Crane coil, T-bolt IV dist. No rpm limit is currently set on the box. Problem now is that if the dyno and or correction factors are out of wack as Haxby and a few others suggest who the heck knows what this thing is really making and where? Correction factors aside, it seems a few people here think the dyno is actually malfunctioning.

Your cam is malfunctioning, that`s real issue.
One of them awesome cams that among other things after 10 pulls the cam is starting to pit because it`s been ground past the hardning layer.