You've just described an early 911 engine! In a message dated 7/27/2004 8:10:13 PM Eastern Standard Time, Wrsssatty@aol.com writes: I, too, vote for the SOHC engine but with EFI, not the 6 carbs (yikes!). And, I think it still had cast iron cylinder sleeves. Wouldn't today's metallurgy allow for a lighter, all aluminum alloy engine? Bill Stanley