LS Guys need quick help

[ksjh1316]

Ok I was not planning on going this route at all but just had a deal thrown at me that may be too good to pass up. I have an option for a 5.3 out of a 05 silvarado with 18k on it and the engine is complete with everything for $500. The question is I had been building a 383 for my truck will the th350 I have work on this engine as well as can i make the new exaust system for the 350 work. This engine is susposed to be drive by wire and cable driven as well is that true? Let me know you guys opinions the 383 just came beck fron the machine shop and just needs assembled so I can recoop some monwy on all the parts just trying to figure out if it would be better to just move forward or change directions. Unfortunately money is starting to get real tight on this build.