Oil filter adapter leak

Thanks Rob, yep the adapters are different. I never knew until I installed one on the 340, leaked like my ring after spicy wing night. That's when I fired up the googling machine and discovered I had a magnum plate. Put an LA plate in and no issues.
[FOR SALE] - Magnum oil filter plate.
360 magnum. Oil filter adapter off of a ‘73 318. All surfaces cleaned well. New gasket kit. Copper washer. Torqued to 50 ft lbs.

Oil dripping from between bolt head and filter adapter.

What to do?

I don't think the LA and Magnum adapters are interchangeable. @4spdragtop knows about this, I think.