Re: head #

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Posted by dave horvath [162.158.62.90] on Friday, August 25, 2017 at 23:53:18 :

In Reply to: head # posted by Jim Starkey [108.162.216.241] on Friday, August 25, 2017 at 17:45:31 :

Chris is right that the later/higher number heads are the high-compression. I have a high-compression Plymouth head in my shop right now that starts with 1405, so I would say yours is high-compression.

All of the high-compression heads I have seen have the extra hump and hole for the internal bypass water pump. The top head in this photo is standard. The two lower heads are high-compression with asymmetrical combustion chamber over the valves and a shallower sloping edge towards spark plug.

Follow Ups:

Re: head # - Jim Starkey 13:21:49 08/26/2017

Re: head # - dave horvath 23:58:32 08/25/2017

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