I traded for a 78 malibu wagon with a 355 vortech headed sbc with ez-efi unit last year, some how the computer and hand held fried, I was not original buyer of unit and they replaced it for FREE I have nothing but good things to say so far about the company. I just got computer and new hand held back yesterday, sent in and replaced under 2 weeks. I do plan to rerun the wires and remount the 6a MSD box. Previous owner before me mounted the ez-efi computer on heater delete plate and the 6a MSD about 6 inches away, instructions state to try and have any noisy electrical componets at 2 feet away. I plan to put efi comp inside under dash pass. area and remount 6a under hood again. I also had to reweld o2 bung on header because they had bung on inside and shift lever contacted o2 wire I put it on out side 180* from before. Good luck with install. Feel free to email me if you want any pics of install or any qs Im very new to it but have it installed on vehicle will try to help out best I could. Again good luck and enjoy and feel comfortable that they back there product.