Matt...I have a hemi, but I switched to a larger cast manifold (Indy 426-4). Has more plenum and runner volume than the Ray Barton manifold I had been running. Both single dominator manifolds. The bigger manifold was stronger up top, but it never made up for what it lost down low. 60 foot slowed 1/2 a tenth! I never expected my 572" motor to be affected like that.
With the nitrous it might not be a big issue, but on motor you MIGHT be disappointed. It may run great, it just seems like a similar scenario to what I was in w/ mine is all. It would have been better in my car if I had the converter loosened up a lot and was able to turn more rpm, but that's not at all what I wanted to do w/ it.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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