Evo98z

I am going to be building a new motor in a couple of months that will see a dual stage n20 duty. I know that a 6.0 block would be an excellent starting point. I was thinking about keeping the stock 4.0 bore and use my stock crank with some Diamond pistons and forged rods with ARP rod bolts. This would seem like a stout setup, as I have never heard of a crank failing. Should I still go with a forged crank? Also what else can I do to make the block stouter, like main studs, and etc.? Thanks

Also I am leaving out fuel and oiling issues as I already have an idea about what I am going to do.