Problem child SD33T

[studeaggie]

Howdy from Central Texas:
We have a SD33T engine in our shop, block S/N SD33-003865T, that came out of an IHC Scout II.
This engine came to us as a complete and total basket case. The only parts that were assembled are the injection pump and the turbocharger. Our customer
purchased it that way, he provided boxes of new parts, and boxes of old parts, unfortunately not all of the old parts that we would like to have, such as the oil pump.
We also have duplicates of some parts, such as fuel injector lines, valve lifters, etc. that lead to the conclusion that we have parts from a couple of engines.
Our semi-retired engine assembler (45+ years at the local IHC dealer, so he knows his stuff) installed the new oil pump. It hit the oil pan. The new pump is a Nissan 15010-C6801, an obsolete number. Looking at various resources and photos on the 'net indicate that it is not even close to correct. A search came up with a Nissan 15010-90063, also obsolete, and an IHC 574945C91. I have found the Binder pump as N.O.S. so we probably have that covered.
The next problem is the actual oil pan. It does not fit either. The oil pan has 28 bolt holes, the block and gasket have 34 holes, the only holes that line up are the 4 at the front and rear of the engine. The question now, does the SD33 have a different oil pan than the SD33T? Does anyone out there know if a Nissan Patrol, or Nissan industrial, or Nissan marine have different numbers of bolt holes? Will someone be willing to share photos of an oil pan, oil pump, and for that matter photos of a properly assembled turbo engine?
This engine is eating our lunch. A couple of years ago we did a Type J Duesenberg that was a partial basket case. It was easier than this Nissan, and information was easier to obtain. Think about that for a while......
Any thoughts or suggestions are welcome and much appreciated.
Thanx in advance.
Studeaggie, AKA Paul H.
Vilas Motor Works
Bryan, Texas