> Another consideration, do these rockers rotate the valves as the stock
ones
> do?

.....no,  not with the long linear contact area of the rocker pad and the
zero offset between the pad and valve stem face.  He didn't seem to be too
concerned about valve rotation because one of the things he preached was to
grind the valve keepers so that the ends _did not_ touch each other when
fully seated on the valve stem.  From the factory, the keepers touched at
the ends, preventing them from achieving a 'vice grip' on the valve and
allowing it to rotate from contact by the lateral offset of the rockers and
adjusting screws.  This mod allowed the keepers to seat fully, forming sort
of a 'wedgemate' with the valve stem, eliminating wear in the keeper
grooves.  He felt that this was more important than maintaining valve
rotation.  Besides, he felt that the valves would get an adequate amount of
motion anyway from the small amount of winding/unwinding from the action of
the spring.

Regards,

Lawrence Dongilli