I'm planning on buying a conversion kit from brphotrods.com, it comes with tranny crossmember and mounts, motor mounts and frame brackets. Pulling the LS3 from a 2500 Sierra with 82k on it... Came with motor, wiring harness, pcm, and accessories. I will need to get my 6L80E. I am looking for 450hp to the wheels. THATS IT for now. It's an everyday driver and my main focus with this car will be reaching 30+mpg.... Swapping literally for gas mileage and the LT1 opti design issue(I have replace opti too many times). What all should I need to know before I start this project. I have read many threads and they started to get overwhelming with info not specific to this set up. My mechanic is charging $1300 for the swap if I buy all parts is that fair? Any unexpected large purchases or hard to locate items that I will run into that may cause issue mid-swap? I'm begging for info at this point as he is suppose to start the swap this weekend and i don't want to be out of my car for weeks because we run into issue... I have someone to tune out vats and do any tuning that's needed at tuners Inc in Jax,fl. Any help would be so greatly appreciated. Also I was looking to spend about 3k total on this swap if possible. I paid $800 for what was pulled from the Sierra, the kit is $500, and I still need to buy a tranny plus labor.. Am I going to make it under budget and if not explain why PLEASE!!!! Thanks for the knowledge in advance