I have b16 head that portflow did complete with supertech springs valves and retainers he also port and polished the chambers and opened it to 84 mm can I put the stock stuff back in since it has been modified? Second question I'm looking for stock pistons and rods or something very cheap for a b16 that has been sleeved to 84mm to return to stock compression is there something available?

 

What do you mean stock stuff? Rocker arms, valves, etc? As for pistons, I don't think you'll find any cheap aftermarket for 84mm bore that will suit your application.