TTA1181

There's a set of W-30 F heads on Ebay. I thought one way to identify them was that the center exhaust port divider came out flush to the head surface. In the picture, in the listing, it looks like the divider is recessed. Is this something that changed in production, the way some some of the W-30 intakes are cast Oldsmobile 455, and others are cast Olds 455?

http://cgi.ebay.com/ebaymotors/1970-...QQcmdZViewItem

2blu442

I didn't think any of the factory heads had a flush mount center divider port. There is the large F cast into the head, but to make sure someone didn't take a die grinder to a E head and make an F you can check the numbers cast into it. Above the center exhast ports near the valve cover will be 404 and 438. The 1970 W30 heads are the only ones that will have this number cast into it. John