I am awaiting my tax return and will finally be able to spend a bit of $$ on my ride. Going to grab me a a 4.10 kit. My question is since i already have a SCT 4 Bank chip can I just have this sent back and retuned for my gears to solve the speedo problem with gears? or do I need to buy a speed cal? Thanks for the help and also does anyone know any reputible shops in the Socal area that'll install for cheap? Thanks for the help guys.