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Old 09/08/2005, 05:28 PM   #5
xcodegtcs
 

Joined: Aug 02
Posts: 16

Re:X code or S code

The heads are different in the X-code. The heads were not drilled for smog,-air injection. Both are C8AE-H and 14 hole exhaust. All 390 GT's and 428cj's came with air injection in 68. So in the X-code is the only non-smog pump car. Date codes should be within the month.
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