My "Quickie Q:" about oil cooler fore and aft foam pads resulted in John "jjs" suggesting that it might be time to resurrect the ever-popular "Hoover Bit" (VW part # 113 117 323) thread for everyone's benefit.
So I've been sitting here this afternoon, poking at the Wonderbus's engine with a stick because I left the jugs and pistons and new heads in the trunk of my wife's car so I can't work on those parts today, while mulling over how to get my push-rods the right length with limited measurement equipment. I thought to check to see if my oil cooler has that famous bit of gasket frame or whatever it is called. It is apparently quite handy for keeping the engine cool when the fan rpms are high. A little Googling produced this useful-appearing page:
This site also has some good pictures: