But I am not sure that this is a from a 1970 GS, maybe the block?? uzzled: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2467678999&category=33615&tc=photo Aren't those heads from a 75'-76' 455? Well at least you get a Crower double roller chain, a 650 holley carb:spank: , , and and Edelbrock intake!!:Brow: thealchemist12(milt)