have a local guy with a g body cutlass with a 4.8 and sloppy stage 2 camshaft with a 4l80e with a stock converter in it and 2.41 gears that he wants me to fix the idle on that hes "going to turbo eventually", im thinking its never going to be great because of the super mismatched combo but if i could get it to at least not die at stoplights he would be happy, what would be the best way to go about this? or basically he just needs a converter and gears?