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That brass fitting isn't anything off the shelf, but I think you can still get them from Chrysler. Search on Ebay and you can find new center sections for the turbo. If you're trying to stay as low buck as possible, just replace the housing and the brass fitting, but be forewarned that a lot of times the steel fitting won't unscrew from the brass fitting, so then you need a new steel line also. Again, nothing off the shelf because of the really short tight bend there. So now you have to get the stainless line/kit from T.U. - so maybe that's just the way to go from the start. Oh, you end up changing the center section, at least get new bearings and seals, and remember to mark the alignment of the compressor wheel to the shaft so you maintain the balance when reassembling.
 

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Yep, think about what's happening inside the turbo when it heats up.....

The center section is cast steel, so when that heats up all the tolerances inside increase, so your bearings aren't fitting as tight as they should, this will allow the shaft to deflect more and possibly let the compressor rub against the housing. You won't feel any of that driving, but as it happens more and more your turbo will loose efficiency from the compressor and the housing being rubbed. You'll even see this on good running turbos properly hooked up, now take away the cooling, and do enough hard pulls and you're taking a toll on the turbo.

I'd start making plans for a turbo swap if you're gonna leave it like that for any period of time. Start scouring the classified for a good used turbo, or maybe the scrap yards, recondition it before hand and then pick a day where you do the swap,
 

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I have no other turbo experience than with TDs, but if other mfgs are using larger diameter oil supply lines, then I would think it's reasonable to assume that the oil is carrying off enough of the heat. If you've ever seen the size of the passages inside one of our turbos, the actual passages that go to the bearings are real small. Even under pressure I can't imagine them flowing a lot of oil, not enough for sufficient cooling under load - moderate usage, some spirited passing on the hwy o.k. A hot summer day, some runs at the track, I just don't see it...?
 
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