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if they just did vats then probably not
we don't do dyno tuning but we know alot about whats involved when doing conversions
90% of proper dyno tuners are drive in drive out commodores so all they need to do is a performance tune so they don't know some of the fiddly things needed when u fit these engines into other cars
and tacho is not the only thing we change so best of take ecu back to yr tuner and tell him to do it properly otherwise tell your tuner to ring the shop that sells the software and ask them what to do as I find most tuning shops think that their **** don't stink and are frightened to ask for help
ask sambo the hassles he had with his ecu that came from good old usa which is why we hate the cheap and nasty kits from usa