[Mike Taylor 3601]

can use flat or dimple flat will add comp.,but you still have hold the min. cc or more in chamber. any angle is legal,can unshroud chamber to head gasket. can cut bowls to somewhere close to depth of valve guide, BUT this cutting has to be done using valve guide as center using valve guide seat machine. Also cc runners some will check to big out the junkyard.
call me if you want Phil I'm better at talking than typing 606 278 0601
Mike Taylor 3601