i have a 87 gn that needs to be tuned very badily.....does anybody have sum1 trust worthy that they recommend that want keep my car for months at a time and do me a very good job.....not southeastern turbo its a .40 over stock block...champion gn1 cast heads....PORTED CHAMPION INTAKE MANIFOLD.....stage5 cheetah turbo....front mount IC.....power plate....55lb injectors....70mm throttle body......razor pulleys.....3in down pipe......turbo tweak chip.......hot wire fuel kit.....I AM IN THA WEST GA AND ATLANTA AREA