I found the guy that made it on fb. Send him a message.
From stalking his pics it looks like an early version, he has a pic with a watermark across it that looks like a improved version that has curve to it.
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99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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