What oil filter adapter do I need for a 340 in a 1964 plymouth valiant.

I would also consider pointing the adapter down a bit. Mine is pointing up a bit and it appears to drain the oil filter when parked. With my TTi exhaust it's a bit tricky to get to the bolt and I don't really want to touch it, because it's finally not leaking anymore. I'm currently testing whether the Wix 51806 that has a standpipe helps with the cold start valve train noise that I had.