A couple questions if I may. When setting up the oil cooler, why didn't you also relocate the oil filter? I use to not think to much of oil filter relocation until I rebuilt the motor in my daily and I hate getting oil all over my nice clean, painted engine, bay, exhaust, etc. when I go to do an oil change.
Also, I haven't owned a RWD CA, but it seems to me like they tend to sit with the front a little higher than the rear of the motor. So why didn't you put the drain plug for the oil pan at the back so you could drain out the most oil rather than at the front? Was there just too much a space restriction because of the crossmember?
Oh, and you stole my idea of painting my valve covers white

Speaking of which, I've heard white engine parts tend to "yellow" over time from heat and getting dirty. Have you noticed much of that on the valve covers? I once was thinking of painting an engine block white but have since been deterred for fear of it yellowing, and I've grown to like a more basic OEM style look of a black block.