Checking several mopar manuals 55 chrysler, 55/56 Plymouth, and 66 Plymouth,
the ONLY reference to hardened valve seats was for the flathead 6!!!! And
that was sort of buried on p.208 (apparently with the 6 around for so long and
the 277 a new engine, that manual concentrated on the v8).
Looks like only the old boat anchor flathead 6 has hardened exhaust valve
inserts!!!!! So much for 'common knowlege' of early mopars having same. No
one ever defines early, or if its a 6 or an 8 for this bit of apparent
folklore.
Almost as bad as the Fish carburetor....
Hope this clears up my and others misconceptions!!!!
Including my own?
L.
However I am still not 'aware' of any problems with my 277 using unleaded
regular for the last 5 years and 15k miles. Runs like a strip-ed assed ape!
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