Recently tore engine down for a rebuild for a pontoon boat install.Went with after market intake and polished and ported 5.3 heads on a 5.7 engine.The block is a ls6.Aftermarket cam and everything else is stock.What bolts need replacing.Should I go with bolts or studs.Do not antisapate doing any other upgrades to internal engine

 

Head bolts and mains although some people reuse mains. SDPC has a bolt kit for these motors.
http://sdparts.com/details/arp-autom...ts/arp534-9805
Give them a call and they will set you straight