: Is there a landmark on the cylinder head to
: determine if the head has been milled? I'm
: guessing that perhaps a spec exists for the
: head-surface-to-rocker-arm-stand-saddle but
: don't have any drawings. What is the
: standard angle between the head surface and
: manifold surface? If the head surface is
: angle-milled, does the manifold surface also
: have to be changed? Also, I'd appreciate the
: website or phone number for Cox Brothers
: Performance. Thanks.

: Finding a "landmark" as a head
: milling referance measurement is harder then
: it looks. I have been measuring different
: heads and reviewing blueprints I have and
: see that there are many differences year to
: year, this makes it hard to give one
: "simple answer".
: The most consistant referance point I found was
: the head gasket surface to valvecover gasket
: mounting surface, this is called-out by most
: of the factory drawings as 3.6 inches
: "Ref." but on most the stock heads
: I measured, this was running in the 3.610 to
: 3.615 range.
:
: The angle of the manifold surface to the block
: surface is easy, it's 30º and most racers do
: not adjust it if the head is "angle
: milled". (just "shim" the
: entire engine around if there is a problem
: with hood clearence or something)
:
: I would not go by physical head measurments as
: much as I would rely on the actual
: "CCs" in the head's combustion
: chambers themselfs, this is called-out at 54
: CCs for all SL6 heads but it also varies
: quite a bit. (usually in the 55 to 60 CC
: range) Valve type and seat depth have a
: major influance on the CC's in the chamber.
: Bottomline, is that it is best to CC the
: head , do the math and adjust from there.
: Here is the Cox Bros. number:(614)268-9920 and
: a look at the factory head lay-out. (one
: piece of 4 pages) Have Fun!
: DD