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FWIW; Rebuilding an old faithful trucks donk…TD42 complete internals (circa hard work yakka 700,000km ++ due) to TD42Ti specs (same tough sound block/head) = $14k by a shop.
Add another say $6k of 11mm pump & turbo supported via an additional intercooler and we could score another said amount again hoping
Tis all relative, IMHO, we don’t live as long as a solid TD42 these days
FWIW # 2…QLD Gurus once taught me here that “NO” the TB & TD blocks/heads are vastly different
Talk is cheap, Torque hurts pockets