Doug at Precision Oil Pumps also makes a billet filter adapter with an additional 1/2" pipe threaded hole in the top, right beside the 1/4" pipe hole. I use them to plumb in accumulators, but it would be great for turbo oil, and you could return to the pan rail like a 391 FT did. There are threaded holes at #2 and #4 main in the pan rail. Just punch one through and you're in! I'd use #2 if if a front sump pan, and #4 for a rear sump. Plumbing that way would send the hot oil back to the pan. A sandwich adapter will send the hot turbo oil to the bearings when it comes back to the engine.