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Here's my build spec from back in 1994(?).
New Cylinder Liners.
Pistons ceramic coated.
Liners installed and honed to OE tolerance fit, each individual piston.
( New piston very $$$.)
New Ring Set.
Total Seal 2nd ring modification.
Block tanked after total disassembly ( Including oil squirters.)
New upper gaskets.
Intake and Exhaust valve stem seals ( They are different and OE Mercedes best.)
Head surfaced.
K liner valve guides.
Head gasket ported....radical.
Valve pockets relieved.
Valve angles left stock but blended.
Crank sonic tested and polished.
Rods sized.
All reciprocating parts balance checked....and balanced where necessary.
New chain and guides.( Mercedes master link.)
New oil pump change and tensioner.
New rod and main bearings.
Graphite rear seal.
Oil squirters pressure tested. ( 28 psi opening pressure, IIRC.)
I/P rebuilt.
Injector nozzles new...German then.
Pop tested to max pressure.
This is best I remember.......maybe some items I have missed.
Standard '84 300D ran 10 second zero to 60 and could do better with stick tyres.
Never got round to inter cooler.
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