whats the most proven cam?
I would look at the tune first, and check the converter...
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It all depends on what you want/budget that will allow XXXX to prove itself/etc etc...
I would guess the MPH and the efficiency (or lack of) with the VIG play a roll.
We need ALL the variables to even guess what the problem is however. Not just bits and pieces.
i'd guess you were on a generous dyno. at that mph you're prob closer to 400whp, which would be more realistic of a stalled auto. a bad converter will dyno lower, as well.
a big cam is a big cam. what makes the difference at the track is setup and da.






