Experience – Cost Cylinder head / engine overhaul B5245T engine

Hy, what do you have for experience in terms of cost of a cylinder head overhaul ? E.g. cylinder head honing (clear) valves regrind, new valves (original or replica/which?) Also possible. piston, ode rnur die Pistonringe ? ect. What should you do immediately, or which replica manufacturer can you take if you want to do everything right and durable. Thanks in advance. mfg Motor B5245T from 12/99 193PS according to Volvo, but according to dieverser lists and AUssage 200P S has. I don’t know what Volvo is doing here, and / or does wrong information?