can someone look at this tune its tuned from ebay where vats etc were removed and it will crank and run but rich and backfiring so before I run it to long on the fresh engine I don't want no screwed up engine don't know if I done this right but I attached my file its a 2000 5.3 using a 0411 pcm from 2002 surburban flex fuel 5.3 engine bored 30mm cam duration intake 283.4 exh 287.2 lift intake 0.598 exh 0.604 stock heads upgraded springs maf map headers cold air turbo 400 trans 3300-3500 stall flex fuel injectors 3.55 gears