Some of what the numbers are comes down to the particular dyno.

But....... I’ll agree, those numbers seem way down.

You don’t say what the fuel is, but a 572” with good heads and a TR should be up about 100ft/lbs from where those numbers are.

Looks like one of those “start low/end low” situations.

It’s almost like there is a slight dip in the power curve, right where I’d be expecting the TQ peak to occur(5500-ish).