in 1970 i paid a guy to tune my 56 vw bug -- it ran worse than before -- that was the last time i hired anyone to do work for me, cause i had a wife, baby, little cash -- so when the engine seized, i got the crap chilton's manual from the library and rebuilt it -- it ran 2 wks, but the next time i got it right -- from that point there was no stopping me, and it is now many engine rebuilds, houses, plumbing, computers, whatever comes up, later -- "jack of all trades, master of none" -- and it helps immensely to have forums like this, youtube, and people like yourself, to draw upon -- when friends ask me how i do this stuff, i'm honest when i say i'm not talented, but i know how to do research

this rebuild would be enjoyable, unless health-related issues interfere, in which case i would use one of the resources you mentioned

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78 240d: Mona
81 240D: Lola
77 toyota chinook: Carlito
93 chevy k1500: Cowboy