Well, today has been a learning experience. I could not get any definitive answer on the short nipple need, but it can only be a clearance issue. What I did get was an education on that super shorty filter, and why it is considered to be undesirable, especially on a healthy stroker motor. The Sunbeam Tiger crowd has some very knowledgable guys, and I communicated with three of them today, the last being an aeronautical engineer who restores Tigers. Bottom line, that little filter creates a situation where anytime the engine calls for more oil capacity it is simply not there, so the filter gets bypassed and I'm circulating unfiltered oil. The answer is a remote filter unit using a full size filter. Product Engineering makes a really nice engine adapter unit, and I'm looking for a comparable billet aluminum remote mount for a filter. Summit has a bunch, but most are cast aluminum which is not so desirable. Once I've selected components I'll be looking for the right mounting location....