I replied to your pm's but we need more info. Is the existing engine a turbo model? A (very) few of the vans came with turbo engines, if so, a bolt in replacement from a 300dt might work. If it didn't come with a turbo, a lot of body or manifold work will be necessary to fit the turbo in the space. There are differences between the van and car engines but the blocks themselves might be the same on the NA versions. The injection pump, intake manifold, valve covers, oil filter housings, water pumps, and ?? are different. Bellhousings are all the same as far as I know so any 617 should bolt up to your transmission.

However, depending on why and where the block cracked, a replacement may not be necessary. There have been a lot of block cracking problems on the Cummins 5.9 diesel and many people have simply had the blocks repaired using a 'stitching' procedure. I would at least give some consideration to this before replacing the entire engine.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13