ok, fitted the common chevy oil fiter adapter to my 82 454, car had an oil cooler take off, couldnt have that, a filter, and the milodon sump, so the oil cooler take off had to go... noted at the time that the adapter was listed only up to a particular year, i think in the mid 70s, ignored this, thinking that after whatever the cut off date was they all would have had a screw on filter.
everything seemed to fit ok, think i checked that the filter would screw all the way on while on the engine stand, primed the oil pump in the car, got 25 psi, thought that was a bit low, then looked down to see a half gallon 20/50 oil slick working its way across the garage floor... ****ing out around the filter seal, are there 2 types of adapter ?

****ed off of croydon...