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

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.
I tend to agree. If it's cracked allowing oil to leak out around the filter plate it'll most likely leak even when plumbed with fittings. You really need to positively determine where it's coming from