FYI - if you are doing an oil cooler delete, watch out for the bolt heads interfering with the filter.
I am using the Melling MFA350 adapter with the AC Delco PF454 filter and the hex head on a 5/16-18 x1 1/4 hits the inside radius of the filter.
A button head allan bolt clears it with about .030 of space.
Also, if you are having trouble getting your oil coated filter off, try this before you pound a screwdriver through it.
Cut a piece of sandpaper about 2 inches wide and long enough to wrap around the filter.
Use an 80 grit if you have it, the gritier, the better
Fold it in half lengthwise so the sand is facing out on both sides.
Wrap it around the filter as close to the base as you can and put your filter wrench over the sandpaper.
The sand digs into the filter can and also digs into the steel strap of the filter wrench.
Also works with a rubber strap wrench.
Ive never had it fail to pull a filter off yet
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