Picking up on what Gordon is saying, he's absolutely right. Have a reputable shop do your 20B build. This kind of conversion has no place with a "backyard tuner" as Gordon says.
And even if you go to a reputable shop, there is still the chance it won't work out for you. I first went to the shop that has done the most 20B builds, the "Banzai" as they call it. Yet, they couldn't quite get the car all together from a EMS/tuning standpoint. I then sent the car to Wolf EMS USA as they wanted to enter the US market and use my car as their demonstration/project car. Turns out the guy running the US operations has a drug/drinking problem and that didn't pan out. The point is there are just a handful of places I know of that you can get the job done and trust the work.
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