I’m in the middle of using this adapter, my engine is already built and running, I’m not going to drill it. I like this one because of the -12 O-ring bosses and use -12 hose and fittings.
Brian at IMM already did a bunch of oiling mods to my block, so I think I’ll be okay running this adapter.
I already have that billet Canton Racing oil filter plate with O-ring on the block.
Hamburger's Performance 3320 Hamburger's Performance Oil Filter Bypass Adapters | Summit Racing