Unfortunately this is currently not a really active DIY forum, particularly when it comes to stuff like engine swaps. There are a few poke-and-hope shade tree guys like me, and even fewer pros, who regularly contribute. You've already heard from one of them (PR) above, and there's another guy who has rebuilt engines - maybe he might have something more to offer if he happens to read this thread. No other active regulars I'm aware of who are familiar with stuff like this. But there have been some knowledgeable contributors in the past who might have posted something related to your issue. Try doing a few keyword searches to see if anything is stashed away in the archives that might help you out.