Need you basic socket set Allen set. Need fuel line disconect kit if using stock head bolts will need new head bolts all of the even the little 8mm ones angular tq meter tq wrench. Will need head gaskets Gm sealer I'm forgetting something also a nice clean work area to keep everything laid out were he knows were it goes. Make sure he loosens the valves and just doesn't take the bridge off you take a chance of cracking the shaft not doing this.