Solving the airflow problem is the key to this build. Toki knew he had to go to a bigger bore size to unshroud the valves. How much bigger? A 4.155-inch bore happens to be a 0.030-over 400 small-block piston, and there are a lot more pistons available for that application. Toki ordered a set of forgings from Ross and had the block bored to fit them. Stock 396 rods measure 6.135 inches. These forged RPM I-beams are 0.250 inch long-they measure 6.385 inches. The block was zero-decked to fit the piston to the top of the bore, and with the stock cylinder heads' 98cc combustion chambers, the compression ratio is 9.75:1.