360X heads flow numbers out!!!

quoted from hughes

Here is the Achilles' heel of what could have been a very powerful head. As the photo shows,
the valve spring install height is only 1.625". This is actually .040" less than stock. What we need is
the ability to achieve a 1.800" installed height This will severely limit valve spring and cam size to
very small RV types. RHS told us that the spring seats could not be cut any at all. You can forget
550HP....hello 300HP. Too bad! Unless RHS is wrong or the head gets re-cast, this head is not
a good choice except for a stock OEM replacement.