Thank you, Guys.
More Tomfoolery, as I had to make a little tin piece to add width to the driver-side head. On the passenger side the alternator hides the valve cover/head width discrepancy but on the left side it's right out in the open. We can't have an obvious hole in the fakery, so I built this tin cap. In the first picture my finger is pointing to a hidden nut to hold the tin cap on, but I didn't know how to mark the tin in the exact spot to drill the mounting hole. I smeared the 'welded on' nut with peanut butter and held the tin piece up tight, but the nut is too high so my brilliant [cheap] move was worthless. Anyhow, I ended up taking the valve cover off again and boring a 'too big' hole for adjustment, and that worked. After I primed the piece of tin, I sprayed on some lumpy paint to simulate castiron and then painted it ultra flat brown.