Help on 408 build

I might get flamed...... but......
I wouldn’t even skip a beat over 10g of piston weight.
The old pistons would come out, the new ones would go in.
I wouldn’t pull the balancer, water pump, or timing cover off, or the crank out.
Rings would get transferred from the old pistons right on to the new ones.

You’ll get plenty of suggestions and opinions about how to go about reconfiguring your combo....... in the end, you have to decide what makes the most sense to you.

What I outlined above is how I’d go about it.