You're best guess please.

Your engine is very similar to mine but you have more cubes, 340 to 408 and a little more static compression. Your cam is similar but not exactly the same as mine. Mine was a custom job by Steve Morris Racing. All of that being said I have between 650 and 700 Hp so I am going to guess you will be between 700 and 750 HP. A stout piece but well within what a block can take. I started out with my timing locked at 28 degrees and worked it up to 31 degrees. My 340 seems to love that and I am hesitant to advance it any more as like you, I wanted some dependablity as well. That is going to be a fun ride for sure.

Jack