I helped a guy with a 505 build last fall.
Not a great overall combo, but some of it was a situation of reusing parts on hand.

Rpm’s with a bowl blend and valve job, original Torker, 850vs carb, 1-7/8” headers, .480 hyd cam.
I told him 600tq/500hp.

Made like 615/510.

You’ve got a better cam, his had better heads.

I’m sure with a more substantial cam and an rpm intake the one here would have been at least 50-75hp better.