B18C5 ~35kmiles. stock, ~9k redline. Honda challenge car.

Im rebuilding with pistons (stock) and bearings (Honda) only and keeping everything else [bottom end].

I can get the piston/pin/rod sets to within .5 gram by mixing and matching. Thats close enough, right?

Either way, where is the best place to remove material from the piston and rod?
I was thinking if needed just hitting the piston with an end mill on the underside of the face, and the rod along the side (concave portion) down the length and closest to the big end.

I was thinking I didn't need to do an all out full balance. The flywheel is exedy 12lb. and the crank pulley is a CTR.

 

just looking for a few opinions thanks. first bottom end build.