How much HP and what do you think it will run.

My engine builder said I have probably have 675ish +or- a few.

He built it……..his guess is as good as anyones.

The fact is………depending on the dyno service being used, the numbers could easily vary by 50hp.
Then throw in the variable of exactly what the cam specs are, along with whether the heads/intake are std or MW port size, and if they have rec’d any work in an effort to enhance the flow.

As the saying goes, “it’s hard tellin not knowin”.