IME the Ambush is a *lot* straighter in front than a Vapor in box finish. I can actually use my Ambush on a fairly wide range of lane conditions, from fresh strips to second-shift dry, but it does seem to have an inside limitation when the track gets too torched.
You might also want to give the Wizard and Rampage a look. I've seen a few polished Wizards out this way, and they roll really well.
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...formerly "The Curse of Dusty," and "Poöter Boöf" before that...