not X heads and not J heads...what are they?
71 GT Dart,
These are from the 1973 '340'.
Note; Special outer markings of {raised square}.
Casting #3671587
Valve Size...... 1.88" Intake ~ 1.60" Exhaust
They should have a 'J' casting mark on the under side of the Cylinder Head.
[URL="http://www.forabodiesonly.com/mopar/attachment.php?attachmentid=138882&stc=1&d=1269486929"][URL="http://www.forabodiesonly.com/mopar/attachment.php?attachmentid=138882&stc=1&d=1269486929"]
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71 GT Dart,
These are from the 1973 '340'.
Note; Special outer markings of {raised square}.
Casting #3671587
Valve Size...... 1.88" Intake ~ 1.60" Exhaust
They should have a 'J' casting mark on the under side of the Cylinder Head.
[URL="http://www.forabodiesonly.com/mopar/attachment.php?attachmentid=138882&stc=1&d=1269486929"][URL="http://www.forabodiesonly.com/mopar/attachment.php?attachmentid=138882&stc=1&d=1269486929"]