Bob/Doug,
Mystery solved?
Don't know much about his reputation as an author, but George Reid, in
"High Performance Ford Engine Parts Interchange" refers to the C4OE-B
castings as improved 260 heads introduced in February, 1964. He also
refers to the C4OE-B casting as being a 289 HiPo casting about a page
later. These are identified by the "289", with two dots above it, cast
into the area under the valve cover.
Both the 260 and HiPo have the same 54.5 cc chamber volume, but Reid
notes that the improved 260s came with 1.67/1.45 valves, while the HiPo
heads used the 1.78/1.45 combo.
He also mentions the recessed spring seats for the HiPo. No direct
comparison for the "improved 260" is noted.
Brian
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net]
On Behalf Of Bob Palmer
Sent: Sunday, March 23, 2003 3:12 PM
To: Doug & Rett Leithauser; rpalmer@ucsd.edu
Cc: Tiger List
Subject: RE: 260 cylinder heads
Doug,
Thanks for your very interesting and informative response. I have now
compared Mannel's and Monroe's casting number application information
and,
other than some omission's, Monroe's data agrees with Mannel - except
glaringly in the case of the '64 260 head. Monroe says C4OE-B whereas
Mannel
(and another book I have confirms this) has C4OE-A as the 260 head. The
truth of this is actually confirmed by your statement that your
combustion
chambers look like photos B or C in Monroe's book, which are clearly
distinguishable from the 260 chamber design, an early example of which
is
shown in photo A. I will not speculate on how your 260 came to have 289
heads, but your engine clearly does not have "260" heads, even if they
are
what Ford delivered to Rootes. I have read in several places that 289
HiPo
heads can be uniquely identified by the C4OE-B casting number, but I
have
never seen a caveat that this casting number could be confused with 260
heads. If your heads are really HiPo 289 heads, then they will also have
screw in rocker arm studs and recessed valve spring seats. Mannel's book
doesn't say explicitly if the C4OE-B heads had "289" cast in them, but
the
regular '64 289 heads had "289" cast in two places, and the '63 & '65
HiPo
heads also had "289" cast, so it does seem curious that they wouldn't
have
cast "289" somewhere on the C4OE-B heads as well. If, as you say, these
heads don't have "289" cast in them and also don't have screw-in studs
(or
were added later) and, more tellingly, recessed valve spring seats, then
perhaps we've uncovered an as yet undocumented head.
I look forward to hearing if your heads have the cast-in valve spring
seats
or not. I expect not, otherwise this would have been an obvious tip-off
that
you would have mentioned previously.
Bob Palmer
rpalmer@ucsd.edu
robertpalmer@paulhastings.com
rpalmerbob@adelphia.net
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