[Hozer 88GTConv]

I'm sure PKRWUD will chime in here, but my .02 anyway.

Yes, have your rotating assembly balanced. You can't build up your block with doubts about your crank. I don't think it is really an option. Think about it later after you are done, it may hurt money-wise now, but you can add stuff up top later with confidence that your lower end is sound. Esp if you are going with a power adder.

I don't think the stock cam is that bad for what you are doing either. A big bad cam on even ported stock heads and stock intake is probably not the most efficient way of adding power.

I'd balance the lower end now, and then do a cam later when I changed heads and intake.