Got some OEM engine tins today from another VW enthusiast. Some I’ll be able to use, some are just to far gone to put any effort into salvaging them. I also discovered (after taking a closer look at the oil dipstick tube) and trying to fit the behind the pulley tin, that my engine is actually a type 3 instead of a type 1. The dipstick tube has been adapted to work like a type 1. I don’t know what other issues this may cause with the other engine tins, but the behind the pulley tin will have to be modified to fit with this adapter.
From Samba user toddb_67 “Based on the serial number of your engine you do indeed have a type 3 1600 engine case from about October-November of 1968.”