Welcome Paul.
As someone that is around Ultra 4 a lot... I can say tuning for that is very very different than street/strip style application. As much as go fast offroad is in and out of the throttle, you need to have everything very accurate and realize a small series of drag races is not the way to think about it.
Just did what started as a COPO LS 427 this weekend. Its now a 447 and a bit more pissed. No IAC on this setup. You could call it go fast off road.
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