Welcome to the Forum! You`ll read it here a million times... but here it is: PLS be careful with the TB.
You`ll need special, precision tools with some diesel skills to do it right (or good help from someone who knows/owns them.
Interesting configuration you are building there! Post pictures for us here once you get closer fitting it in.
I have the factory d24t book somewhere so I could picture the wiring diagram for you, if very necessary.
You`ll be surprised to realize how simple it is: these d24 engines do not need a lot to run, you`ll be able to build your setup very easily. The Inj pump needs 12volts to the shutoff valve, starter needs wires and the glowplugs need their wire, alternator, beefy battery cables and that`s about it. :`)
I recently refurbished one of these and documented many of the major steps in a thread `Rear axle/differential setup`. It may help you to see all engine details well enough that you could build your own cooling system.
(
https://www.d24t.com/showthread.php?t=2044 )
Posts #54 to #59 show quite a lot of the cooling system and I did spend a lot of time listing all hoses in there and the part numbers.
In post #77 you can see walk-around videos of the engine running on a stand and could see/check out the routing of many coolant hoses. Those links to my d24 YT-videos may help too, or I can make a NEW, full close-up video in the garage tomorrow (and go hose by hose, to show you). LMK what exactly you`d like to know.
This video also helps some:
https://www.youtube.com/watch?v=_x0qJfFrZUA
I also have a start-up video uploaded, in 3 parts, it shows the cooling system; look for it here:
https://www.youtube.com/watch?v=EHbjoEiOEBo
https://www.youtube.com/watch?v=d8MP3d6dhDk
https://www.youtube.com/watch?v=1W5aAjXFmfY
This one is a walk-around video too.
https://www.youtube.com/watch?v=_x0qJfFrZUA
What is your engine exactly, an earlier d24 with turbo added or a factory d24t? What year, and are you keeping the oil cooler (if any)? (there are some slight differences in d24/d24t coolant hose setups)
I also have used and new coolant hoses for this engine and could take pictures of them for you, measure length, angles, etc.