Well, the head has a stock VC bolt pattern (the cylinder head guy hates us for that too). The valve cover rail has been cheated over and slightly re angled to get it to cover up the valve springs. While I dont know if a regular "Thunderbird" cover will clear the rockers, I think the tall finned aluminum or pentroof will (Maybe some minor clearancing). Its just hard to say until we put the first one together. I know they will clear with no rockers, since that is how we planned to pass teck in pro nostalgia if the rockers wouldnt clear.....figured we would roll through tech with some beat up, paint peeling "Thunderbird" covers off of a 352 or something. If we hadnt insisted on a stock VC pattern, no symmetrical ports, stock looking plug location (it is moved on these heads) the head could have been much more radical. Always a compromise. They can be made to flow more, we just had them set up for a 4.250 bore and N/A. We are building a turbo version first, but we have some extra genesis iron blocks, and may do a radical N/A motor just see see what we can get out of 427ci and 2 4150's.
