Looks like they may be mex caps.
Sold for <b>$610</b> by rampage_mike<BLOCKQUOTE id=quote><font size=1 face="Verdana" id=quote>quote:<hr height=1 noshade id=quote>Ford 289 engine block with heavy main caps, standard bore, no cracks, nice condition,.010 to clean the cylinders, Threaded frost plugs and oil galleries. Has been out of service for some time.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana" size=2 id=quote>
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