Original Source: https://ciarchive.fordsix.com/HeadSwap.html
First, let start by saying that all 144, 170, 200, & 250ci heads are interchangeable.... and while the valve size, chamber size (cc's), and intake/port volumes (cc's) changed over the years, all of the small six cylinder heads will physically bolt on and function on any small six. However if you were to put a cylinder head from a 144ci or...
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