So my top choices as of now would be a VW ALH 1.9mTDI with a Land Rover 2.5L 200TDI Bosch VE mechanical injection pump. It's nearly a direct bolt on to aVW ALH using the ALH bracket and pulley.
Then trying to run an R151F  from an HZJ73 Land Cruiser, mated to a VW ALH 1.9TDI, using a Diesel Conversion Specialists adapter for the 22R/W56 that utilizes the stock Toyota flywheel and starter. The ACME Adapters bellhousing adapter will work, but then I am on my own as far as getting a flywheel to mate up to the VW crankshaft. The Diesel Conversion Specialists kit has a thicker/aluminum dowel-pin-located fancy CNC'd 6061 T6 adapter, and utilizes a crank hub adapter to be able to bolt the Toyota flywheel direct to it.
the only problem is, this kit is only designed for the w56 transmission, not it's more rugged big brother.
No problem at all if I have the 22rte turbo transmission bellhousing that mates the r150 1/2 a 22r engine block, but these things are getting hard to find! I just missed out on one on eBay trying to make offers for a better deal, should have taken the deal at $420, as I procrastinated a half day on the acceptance of that offer, when someone else had already come in and swooped it up for $475 buy It now price!
If can go Advance Adapters R150/R151 to W56/22RE bellhousing kit, to utilize the readily available w56 bellhousing, but I will run into slight compatibility issues between the two different adapter kits at either end of the bellhousing. The Advance Adapters kit works fine if you are going straight to the crankshaft of the 22R, but the very nice looking Diesel Conversion Specialists ALH 1.9TDI to W56 adapter kit includes a special crank adapter hub with a pressed in pilot bearing. the advance adapters w56 bellhousing to R15#F series transmission includes a special extended (by 15mm) pilot BUSHING. This does not appear compatible with the Diesel Conversion Specialists pilot BEARING style 6061 T6 crank hub adapter.

my only option this route is see if they can make it with an extended snout / register for the pilot bearing, being 15 mm further back protruding towards the transmission. Obviously the 22RTE R151F bellhousing will work better/easier here.... of course I could also probably turn something up on the lathe fairly easily that would locate perfectly on the existing flywheel adapter from this kit oh, but I may be able to see if they can do a one-off for me and make one that has the pilot bearing register area extending out 15 mm further.
I will have to look at a 22R flywheel and crankshaft to see if there is even enough metal that would be able to protrude beyond the flywheel there to do this safely.


If I were going with an AHU TDI conversion, I could just use the ACME ADAPTERS kit, but the flywheels are different ALH to AHU.

also going alh vs. Ahu, I have to fabricate my own engine mounts, and deal with any other issues. The acme adapters kit that works for the 1Z/AHU engines and the older 1.6 + 1.9 IDI's has all of the swap issues figured out, and includes nice engine mounts, optional angled oil filter adapter to clear the frame, rear water housing/temp sensor bungs to clear the firewall, & has all of the applications for radiator hose sources already figured out.

But the longevity of the ALH & direct bolt-on of the Bosch Land Rover 2.5L 200TDI/300TDI pumps and the lower price and more readily available nature of the ALH engines is very appealing. durability and longevity as well as trying to set this up with the best stuff that I can for the long-term are definitely important factors here. I can keep running the Suzuki gasoline stuff for the time being as I slowly piece together all of the conversion parts needed to do the ultimate swap.