The filter screen is longer on the 220. Thanks for the replies. I realized I could pick up an adapter made for the 300 SL. Paul Russell has them. I'm having it modified for the shorter filter of the 170. This adapter replaces the cover only, and the spin on goes onto the cover, This unit could be used as is on the 220, but I think there is not enough clearance between the filter and dipstick tube. I'm going to check this again as we will be putting together a 220 engine in the near future.
I take some pictures of this thing when I get it back today from the machinist.