I didn't build mine with a HP number in mind, like I said numbers don't mean anything. I put a rather mild camshaft in as I was aiming for torque not HP. But it looks like you are building yours for a different reason , or end use, than I. I could get more hp with a larger cam but I like to be able to drive mine, even in stop and go rush hour traffic.
Mine started out as a simple rebuild but damage to the block required custom parts. Be warned this stuff is not cheap I spent over $10,000 before I started to bolt anything to the block. That did not include machine shop time.