I'm big on turbos, but from what I've read and heard, the blowers from both procharger and vortech that you would need to support a 347 would be some of their higher end stuff. I've only heard good things about them, it's some of their lower $$ stuff that has problems.
What kind of compression are you running? Anything much over 9.5:1, I would want something with an intercooler though.
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91 single turbo vert
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