Has anyone heard of MROZ Complete Auto out of Merrillville Indiana for custom dyno tuning? I have a 2001 silverado with engine mods and open exhaust and such that I am currently installing a magna charger on. Magna charger could not help me with a tune because of my open exhaust and no egr system. The truck previously came with a 4.8 w/egr, that I have replaced with a 2002 low mile 5.3 w/o egr. They quoted me around $1000 for two days worth of custom tuning to get the truck running perfect. I am out of South Bend Indiana, which doesn't leave me much choice for dyno tuning shops. Any help would be appreciated!