Hello All,
Thanks for the thoughts it's appreciated. The two cobra's I'm currently most interested in are both over 650 HP motors both of which had the Shelby block (ERA and a Kirkham). Considering it's hard to see the block in a Shelby, don't think I'd personally be concerned about the castings. Certainly seems there was room for improvement in the oiling system in the stock side oiler and virtually every high performance block out there has cross bolted mains, both positives in my book.
Plus if some one asks if it's a real shelby 427, you can say yes
.
Cheers,
Mike