The D24T is through the block skirt too, at least in a Volvo (Pinzgauers and LTs are different, they're through the pan). A D24 in a 200 series is through the pan. I imagine a D24 in a 700 series is probably through the block, like the D24T, but we never got NA 740 diesels here so dunno. :P
I'd strongly suspect that equivalent-year D24T and D24TIC blocks are the same. Getting into the later years (late '80s and 1990s), there might have been some differences -- later motors got hydraulic tappets, and some very late D24TIC motors with EGR had a completely different timing belt arrangement with a fixed water pump and separate tensioner roller.
If you want to confirm what yours are, check the block code stamped just below the headgasket, on the driver's side under the vacuum pump. If your two motors share the same code, safe to conclude no differences in blocks. Our mechanical-lifter D24Ts here, IIRC, are coded DM (or DV? can't remember...). Both of your motors probably are something else though, since I think they're likely new enough to have hydraulic lifters.
Here's where you'll find the block code (this one's a different code out of an early Pinzgauer TD...)
