When/if to upgrade bearings, piston rings, and headgasket?

[josh930]

I have a 57trim turbo thats going to be put in and the owner before me put in a stock head gasket with arp bolts..... is this headgasket stong enough to hold up to the 57trim turbo? If not I'll be putting in a metal head gasket but while Im doing that, should I replace the piston rings and rod bearings? My car has 129,000 on it. Also, is there anything else I should replace while I'm in there? It sucks because I just did the oil pan on it and had the engine out. I just didnt have the money for it at the time. I really dont want to do the headgasket just yet. Also, whats the max psi for the 57trim with arp and stock headgasket if possible? Thanks, for the help. Josh

 

[robbo185]

you shouldnt have to think metal head gasket IF:

you have arp bolts and stuff
you are torqued properly
you have a good tune
no detonation

that should be good till around 350-400 hp from what ive seen

 

[josh930]

Thats exactly the answer I wanted to hear. Thanks