Oh and to answer the casting date question on the repro crossram manifolds. The guy from Arizona that is selling them has said that they carry correct 69 casting dates. Don't know if you can specify a date or not. don't know about the dating on Heartbeat City's version.
http://www.camaros.net/cgi-bin/forum...c/6/5206.html?
Can't quite read the month but I can see 68 (or 69) in the date on this one (maybe 10/11/68?):
From this auction:
http://cgi.ebay.com/ebaymotors/ws/eB...tem=4513799341