I'm trying to decide what would be the best cam set up for my 55 Bird. I'm not going to race it, except when I am getting on the expressway or passing. Its a 292 Fordomatic with a 3.31 rear end. The car will have a Holly 365, modern dizzy, stock heads (1.78), b intake and headers depending on cam choice. Considering Mummert's Y-265S or Y-270S. Will I need special timing chain sprockets as in the link below.http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150388109897&viewitem=&sspagename=STRK%3AMEWAX%3AIT