Here is some older bypass oil filter info.
It is easy to drill and tap the Oil Filter Cap. The long tube on the filter cap is just press fitted into the Cap. That allows you to drill in the center of the cap from the inside or drill someplace else on the cap and avoid the casting webs.
The part that needs more thought is where to put the oil return line from the bypass Oil Filter.
There is bolt on the front side of the Engine that appears to be there to keep the Timing Chain from hitting the block or to keep the Chain from coming off of the Timer Gear. I don't know if either are true. However, I got a bolt of the same size and put it in My Lathe and drilled it through and put a fitting on the end for the oil return hose.
Later I realized if you have an MW Fuel Injection Pump there is a plug on the left top side which can be removed and you could put some fitting there to drain the oil from the bypass filter into.
Can't quite remember what is in the threads.
Bypass Oil Filter Setup, 617.952 Diesel911
Bypass Oil Filter Setup, 617.952 - PeachParts Mercedes-Benz Forum
My Bypass Oil Filter Thread
Bypass Oil Filter Setup, 617.952 - PeachParts Mercedes-Benz Forum
ForceInductions Bypass Oil filter, My 2nd Bypass oil Filter, and Oil Filter Adapter plate
By-pass oil filter install - PeachParts Mercedes-Benz Forum
I fooled around with 3 bypass oil filters. The last one was a Frantz Toilet Paper one. That is the one I had on the longest. However, about 5 years a go I took it off to change the Hoses and I never got around to replacing it or in fact got the new hoses for it.
If I remember correctly in the Forcedinduction thread he bought a generic base and used the Amsoil Filter. Another member used an NTZ Bypass Oil filter.