DONT BUY 4x4 parts stuff. if you want to upgrade the cams, buy a jim wolfe stage 1, or find a VG30 and use the cams out of that. the Stage one is similar to the VG30 cams. also port and polish the heads, as far as injectors, I've never heard of the VG33e or er having issues with injectors. if they're working now, re use them and save the money. there fine. at most you can have them flow tested and cleaned. but its 25$ a injector.
i have a built VG33E jim wolf cam stage 1, port and polished heads and lower intake manifold all matched to the gaskets.
just needs to be put together. I'm waiting to hit 200,000 k on the body. or 100,000 on the engine thats in the truck. and the only thing left for parts that i need is the timing chain stuff. then ill put everything together, just other stuff is more important, hydro assist, exo, 3 or 4 link rear.