340 parts interchange & performance Q

I know there are more potent combos out .... but I'm also not sure what this will end up in. I'm also not planing on hitting 6500rpm. Something a little over what a 68-70ish 340 came from the factory with is good enough for me. If I was 18 again it would be a differant story. I'm not looking for something to set any records with, just something that will live up to the reputation that a 340 has come to be respected for. At a later date that may change, but for now a step above stock is good for me... apx. 300HP and I'm content.
So I shouldn't have any problems using the older stuff in my '73 340? Personaly I would feel ALOT better knowing my engine has a "fresh" balance on it and that it's blue printed to optimize the power potential. I would rather used a forged crank, mainly because I prefer the "Tim Allen" treatment.... don't just do it... Over do it!!! And I would rather be safe than sorry.
Any one have a prediction on what this combo will put out?