No offense, but it takes someone who knows a LOT about working on cars to know if someone else is actually intelligent or not. This supra guy might be a whiz at working on his Supra, but he could also be feeding you line after line of bullshit like 80% of the people I meet who "do their own work." But, assuming that he does know how to work on his Supra, that doesn't say much about turboing a 420A. This is why having someone else build you a turbo kit (especially someone who doesn't work on a 420A) is generally not a good idea. Although you MIGHT save some money, you are getting a one of a kind kit that has not been tested and has no customer support. If you were an experienced mechanic and could do all of your own work, I'd tell you to go build a custom kit yourself because you could pick and choose exactly what parts you want. However, being that you aren't an experienced mechanic, I'm telling you it's smarter to go with a kit that 1000's of others use every day. The extra money you spend will be worth the piece of mind that you get with a tried and true kit alone.

There's a good reason you're getting flamed in this thread. This same situation has come up again and again here with only a few people who were actually happy with their custom kits (and those people are the ones who built the kit themselves and already knew what they were doing). The best advise that people here will give you is to take your time, read up on what you're doing, buy a kit and install it yourself. If you don't want our advise, then why are you here?

Matt
1995 Eclipse GS
2.0L, S16g Turbo, 8 Injectors, 26psi

1998 Eclipse GSX
2.3L Stroker, AEM EMS Converted to Speed Density, FP3065 Turbo, 35psi , and so on...