Hello Jon,
I can answer a few questions for you. The flywheels between the turbo and non turbo should be the same. As for the mounting angle, the non turbo D24 was mounted off angle to fit in the smaller 240 series cars, while the D24T was straight. There are different oil pans from what I understand, but I dont have any idea what the part number would be. Same goes for the flywheel, it would probably be easier and cheaper to buy a used one. As for the bolt pattern, it shares the same pattern as the 5 cylinder diesel... I have never heard anything about them being the same as the gas engine. Also, the imput shaft of the trans in the porsche may not be the correct sline count, depth, diameter, etc. to work with the diesel clutch. It may be easier to use a volvo trans like a M46 or 47. The difference in mounting angle is in the bellhousing, so depending on how the engine fits, you can do it straight or angled.
Try to start with a turbo engine, they are much more robust. The block is a stronger alloy, they have piston oil squirters, an oil cooler, and tended to have a longer life (if you going to bolt it in used) thanks to cleaner burning with the turbo. The non turbo engines sooted up the ringlands badly.
Good luck finding parts, I read in your intro post your in the midwest... I'm in St.Louis and it took me a year and a half to find a diesel volvo. I have never seen one or parts for one anywhere around where I live. My car came from Nebraska, I had to meet the guy in Kansas city to pick it up.
I don't know of any PDF files to download as far as manuals are concerned. The factory shop manuals are still available, they are called the green books. Finding them used is possible, and they are still available new:
https://www.volvotechinfo.com/index....dRow=20&page=1
If you go through the few pages of manuals, you will see different D24T manuals mixed in.
Jason