340 build

Pay attention to the top piston ring gap. And if you have not done so already have a good local shop balance it. Replacing stock rods with Scat I-beams will shave weight off allowing engine to rev faster and reducing stress on the crank. If you stay with the stock rods get them resized or at least have a good local shop look them over. Stock rods are plenty strong just not as strong as the Scat I-beams and heavier. Get crank checked over by a machine shop for run out and taper. Overall sounds like a great build.