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Message: <blockquote data-quote="ttocs" data-source="post: 1465995" data-attributes="member: 11896">unless you are seriously dedicated to investing $1500+ and hours of time researching, and then installing, and then sometimes correcting/tweeking/replacing it after you f'ed it up(it will happen somewhere) I would check out your local shop again.  I don't think you understand how bad a car like yours scares a professional shop.  Your rolling in saying your don't really know who you got it from or exactly what was done with it but it has injectors that are absolutely too big right on the top.  Its having some problems overheating and other things we probably have not covered yet but you want them to slap it on the dyno, run it up to redline and tune it.  I will repeat myself the last thing you want to do is start diagnosing what could be bad work on a dyno or you will learn like me the hard way by swapping a motor out and the work on mine was paid to and done by a mustang shop!  On the dyno sometimes they go, sometimes they blow and that is when nothing but professionals are involved now throw in some unknown shadetree mechanic and that is why the shop owner "politely" turned you down for tuning it sounded like.  Even if you were to swap the ecu out yourself you would need to diagnose and then fix these problems that you already do not know how to fix before you could get it running right.  If that shop only does tuning, see who they recommend for repairs but I am willing to be they do work there as well and would be happy to take a look at the car and make some suggestions and get it to at least stay in temp before trying it out at redline.Now I hope I am not insulting you but it just sounds like you do not exactly know what is wrong with it now and instead want to start running before you crawl.</blockquote>