Check the stretch of the timing chain, fix as needed. Retarded timing of valves and injection pump will rob some power. Consider an offset key in the camshaft gear to advance the camshaft timing.

Once timing chain is correct, advance the injection pump timing one or two degrees.

Test your ALDA with pressure or vacuum to make sure it can hold pressure (preferable) or vacuum. Replace the o-rings inside if it can't, or get a new ALDA, or just remove it and risk melting your pistons (install an exhaust gas temperature gauge?).

Adjust the injection pump governor for higher RPM fuel cut-off, and increase the fueling a bit. Turn up the turbo boost a bit by adjusting the waste gate, go for 15 - 18 psi.

The only real expenses will be an EGT gauge and a boost gauge, and your time.

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC