remote oil filter fittings tapped right into the block UPDATE in post 58 and the whole idea got 86ed

you are probably right, but I can NOT think of anything else that could cause this leak, so by building the remote filter setup like this, at least I can eliminate the machined sealing surface
IF it's cracked anywhere inside (under) the 710 plate putting a remote filter ain't gonna solve the problem. And it'll be a lot of effort for nothing. I would positively identify where the leak is from FIRST. I have a feeling the original plate wasn't installed right the first time. Just my two cents.