At some point you should figure out which parts that you have laying around are going to play well together. Personally I hate to see an extreme mismatched combinatio.
I know you don't have any ET goals but choosing the best combination from the parts you have or are willing to aquire could be a good goal to set. I suspect this is what you are already trying to do. If you are considering a reground hydraulic roller cam this will probably be the rpm limiting component in your build. Once you know that you can choose the rest of your combination to compliment that rpm range.
I have seen motors on my dyno that never get to peak horsepower because they float out (hydraulic rollers) or don't have the bottom end to support the rpms needed to get there. Personally i sometimes feel disappointed when I see that but my customers most of the time are not. They are usually stoked just to see it run.
