[b-man]

I would leave the N crank in it if it’s looking as good as you say.

That crank is more than adequate for what you’re doing, with a lighter set of rods and pistons it’ll be even better than before. Stock 2-bolt mains and bolts should be fine as well.

You’re kinda on the edge of where using a forged crank would be better but if budget is a big concern you’re probably fine keeping the N crank. If you do change the crank then some studs for the main caps along with an align hone would be a good idea since you’re spending all that dough. An aftermarket cast crank shouldn’t even be a consideration.

It’s up to you whether or not it’s worth throwing another $1500 into the build to upgrade the bottom end and that’s keeping the stock 2-bolt caps.