The Oil Filter Housing for the String type Filters is the problem.

String Type Filters are used in industrial settings and the Filters are cheap compared to let us say an Amsoil Bypass Filter. However, the Filter Housings that are made for those filters are around $249 or more.

So, I made the Oil Filter Housing myself out of a section of Exhaust Pipe and cut the 1/2" Steel Plate with Hole Saws.

To say that sounds simple but it ended up being extremely labor intensive.
And, the labor intensive part is sad because I had wanted to be able to make the Oil Filter Housings and sell them as an alternative to the more expensive Bypass Oil Filters that are sold.

But, unless I find an easier/better/faster way to make the Oil Filter Housing I cannot sell them.
Also the way you change the Oil Filter is not suitable for a commercial product.
Because of the above I have not put any more effort in to making some until I can figure out a better way to do that.

So the easiest way to go is to buy a Filter Base to fit the Amsoil Bypass Oil Filter and the related Hose and Fittings. On the low end that is about $30; on the High end about $40.

Unfortunately the smallest Amsoil Bypass may cost as much as $32 each. However, when ForcedInduction was a member He said that you will not be changing it often.

When a Bypass Oil Filter is plugged up when you feel the Oil return Hose that Hose will not be hot because there is no longer Oil passing through it.
So you could simply keep your Amsoil Bypass Oil Filter in use until it is plugged.

If you are willing to accept 5 nominal Microns of filtration you could use the Filter I started off using at the beginning of this thread. The Oil Filter used is a Bypass Oil Filter From Carrier Gen Sets. They are arouns $13 each.
5 nominal Microns of filtration is better than the 22 or more nominal mircons of filtration that the stock type Filter has.

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84 300D, 82 Volvo 244Gl Diesel