Originally Posted by
midnight04
They are not even close to IDENTICAL!!!!! 706 Cast heads were SPM cast (Mold) and 862's are Sand cast (Pressed) The SPM cast is 100X better than sand cast heads. That is why the 243's are SPM cast over the truck version 317's, and the L92's 823 Sand cast VS the LS3's 821 SPM cast.. starting to see a trend? GM SPM cast all of the HP builds and sand cast the truck builds! The SPM cast is the better option stock for stock. Ported they are the same! You will find the sand cast heads have tons of slag in them making it more time to port them.............. You are starting to look like a real prick in here, After you jacked my for sale thread I looked up your posts and you are starting $hit all over!