I have a matched pair of 1970 350-300 horse 3947041 heads dated D-20-70 and D-21-70. These are untouched and have never been ported, etc. They look like early take offs. I have had them for about 10 years on the shelf. I am blowing out everything I will never get around to using. On ebay with a $125 reserve.
http://cgi.ebay.com/ebaymotors/ws/eBayIS...K%3AMESELX%3AIT
Thanks SYC,
Matt