Quote:
Originally Posted by JJDeville
Yes, the one I have seen online had the same modifications. I read an article from back in the day where the were building all of the 455 engine identical to each other. They sourced used engines and bored them to 462 for a basically new engine. The article stated that they also used a specific head for 9.2 compression ratio and enlarged the valves to 1.77. My car has 6X heads though I don’t know if they are 6X-4 or 6X-8.
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Very easy to check, there will be a little boss near the valve cover around the top of the heads.
http://www.wallaceracing.com/5cheada.jpg