[PAUL K]

Butler pistons have some of the largest valve pockets in the industry "for a reason".

If the information posted in this thread about valve sizes and relocated valve guides is correct one better be sure to check the piston to valve clearance carefully and in all directions.


A 2.11 intake valve has the potential to flow 350 plus CFM in a standard port Edelbrock head.

A 1.66 exhaust valve will support 900 plus horsepower.