1st of all do you think a caned tuner knows if your truck is a high miler? This is the exact reason to use an efi live tuner so he will know whats safe for your motor and trans.And 1000?Depends if you want a v2 with the works or if you want a pretuned ecm or a loaner auto cal to install your tunes and then return it.EFI live is the way to go for sure.I want EFI live but with high mileage and a stock tranny would it be worth it to me? I mean why spend a grand on it if i cant put but a 100hp tune on it? Course I'm green at this too so if I'm all wet by all means call me stupid... looking at around $100 for one o the plug an go tuners... Don't wanna spend much cuz of what's already been mentioned....