396/375 cam for street 454?

[nuch_ss396]

Tom, Jim & others,

Can any of you tell me the flow differences between the
oval port heads mentioned in this thread? I don't need
actual numbers, but I am trying to understand if what makes
one oval port head better than another was the combustion
chamber, and/or the intake runners, and/or the exhaust
ports.

Stated another way, do any of the oval port heads of
interest here have significantly different intake or
exhaust flow numbers? I always wondered about all the
different heads Chevy developed and more importantly - why.

Steve