mate i can talk from experience on this shit iv done a big end in a gtr r34, then the same in my supra twin turbo and then threw a rod in my current car gtr r32, i would shop online ebay and even talk cash locally top racing did me some killer deals for cash, i got my tomei 2.8 kit there crank rods pistons rings i bought every thing first then shopped around for a builder ,i would be doing bottom end rods pistons ect first build a strong base first then bomb something worth doing it to .i ended up putting tomei 2.8l kit new block new balancer, big sump, cams ,valve giudes,springs, berry rings, lifters,all bearings ,1000cc injectors fuel rail ,oil cooler, two new turbos ,oil catch can ,new dumps, tomei oil pump n1, water pump ect ect ect and all the rest that go's with a full engine build for a little bit less than that quote so shop around workshops hate it but its your money need any advice im sure there's plenty of people on here that have done the same .