Arizona via Texas & an unexpected 240

[!242TDi]

Howdy y'all....

to clarify the title, I'm originally from Texas, but I'm living in Az going to school for a master cert in everything remotely automotive I can get from the school I'm at, and I managed to get a junked out old 242 volvo for my project car in all my classes for free from my brother. Its a 77 with what I believe is a B21F, though I still need to check numbers b/c my brother said the guys he bought it from swapped in a different engine and he doesn't remember which one. Either way, between the two of us, we've pondered all sorts of engine goodies for it if either of us kept it, which I've finally decided to do, including a TDi or IDI swap of some kind (hence the user name). My latest idea has been to throw in a D24T as long as I could do it for reasonably cheap. I was initially scared of them because I heard the typical horror stories that follow diesel volvos, but turns out they can be pretty cool if you give them some love! I mean, they came in Pinzgauers overseas for years, if they came in an expedition ready vehicle like that they can't be that bad properly outfitted. And I've grown up nursing all sorts of engines along that few others seem able. So, I've decided I'd give it a shot. It could be fun at least

So, as a newb whose still doing some research, I still have a few questions (forgive me if the info is out there and I just haven't stumbled onto it yet)

1. do the D24 and redblock volvo motors use the same crossmember, or can a stock redblock crossmember be fabbed within reason to accommodate one?

2. If I found a 760 donor car (which I have, I'm just on the fence buying it based on this info), would it be a mostly straight-forward if not straight-across swap?

3. If the motor doesn't run, what do I mainly need to look out for? I know these things tend to overheat stock, so the usual things with that, and probably if they ran it outa oil etc, but any other specific D24 or D24T type things?

Thanks in advance