makes me think that the previous owner either trashed the Redtop, or simply upgraded to a Blacktop, and simply used the Redtop valve cover. I think it looks nicer <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'> Do you see any evidence of a motor swap?
Eric