My sympathies bob I just did the head on my SDL you would think just tear it down and put the new one on. OOHH NNOO start with get guide pins stuck, to break little inline vacuum filter, to not be able to mate turbo back up right, to not be able to get @#$%$#@ guide pins back in, to bent said @#$$%#@$% guide pin when it stuck half way so get new one, finally get it all together and bury it in the mud in the yard. Hope not everything goes this way but if it does comiserate.
BTW Thanks to all for the info in said head change.

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87 300SDL 220K
85 300SD 218K
82 diesel Chevette 440K
85 subaru 4WD turbo
83 4.1L buick powered cutlass THE TOY