What about moving radiator right or left ?
It's higher,it's a flat type manifoldI have not heard a restrictor on the turbo oil outlet, they are usually only on the oil feed. Is the turbo drain outlet point well lower than the bottom of the turbo? If not you should consider a scavenge pump or VDO.
Yes,it a heavy keychain now, I also think the problem is the drain,3/8 it's way to low, will drill n tap the sump to an10, the turbo you mention looks good but I see the exhaust flange could be a problem as I need to run t4 t3 four boltCut your losses on that one, use it as an expensive paper weight.
The site you referenced the refurbished GT2556V looks like it would fit very well with your setup.
That's true....I went for wossner rods and pistons, the turbo..bad choice my side...I'd never heard of maxpeedingrods but their turbos look ridiculously cheap. I also see lookalike Carrillo H-beam rods for 1/4 the price. Wonder how long they'll last. You get what you pay for.