If by "block mod" you mean smoothing out the hard 90 degree turn the oil makes right after entering the block, I would say definitely do that. It is a 10 minute deal and costs nothing if you already have the tools.

I don't think increasing the oil pickup to 1/2 is necessary, but it does not do any harm unless the procedure is messed up. At that point it does a whole bunch of harm I would never do it to one that looked thin to begin with. So if there are any second thoughts, don't do it