Best reverse gearbox for busa swap car?

Suzuki Squared

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Hello again everyone. Just picked up a Gen 2 Busa engine with around 500 miles on it for a build
I'm working on. I was wondering if anyone has experience with mechanical or electric reverse gearbox's? I know Elite Racing carries a few, but from what I've heard is they're almost deafening while driving, depending on the location. And the Quaife gearboxes I haven't heard anything about, and they don't have hp or max torque ratings on them. I'm looking for one that can handle 450 max whp and 350 max lb-ft of torque. Elite Racing is what I'm leaning towards, but the loudness of them is throwing me off a little. Any experience or knowledge will be greatly appreciated. Thanks in advance everyone!
The car on the left is the one getting the new heart!

CappoZam 2.jpg
 
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