Bore to Stroke Ratio

Square the bore and stroke as close as possible . Example is 4 inch stroke 4 inch bore.

Square deck off of the crank mains .

Do all machine work with two torque plates bolted on not just one per side when honing

True the lifter bores many of these engines are not trued or are worn bad due to being 50 year old high mileage engines.

The most important is balancing. The closer you get to 0 grams the more power you will make up in RPM's. Balancing is the most critical.

Sufficient oil to the rockers and springs. Springs get hot they need oil to cool them.

There are many things to take into consideration when going for performance and durability. these are just some basic items to consider. RING GAP IS VERY IMPORTANT and changes are made depending on the fuel you will be using and power adders such as boost or NOS.

This is info I get from my son. He has done many engines and the line to get in here is very long.