Need advice on installing an oil filter adapter

Here's a page Clair put together a few years ago comparing the flow openings.
340 Right Angle Oil Filter Adapter

But for this build I wouldn't worry too much about the openings. Chamfer and smooth what is convenient and put it together.
The thing that is worth worrying about is getting the clocking so filter and be removed and installed the most easily.
so the new housing and the 20% greater flowing old bolt? Sheesh! I tell you with my 90 adapter and Hooker Super Comps in my 65 A, I still could barely get the oil filter out, and that was juggling it with oil dripping all over the place. I could have went with a smaller filter (smart) or use a filter relocation up onto the fenderwell and never F with that stupid oil filter inside the headers...I did the latter. A good filter with an anti-drainback valve.