Of those 2 choices, definitely the Torker 2 since this sounds like a pretty stout engine.
This is assuming the Performer manifold you have is not the Performer RPM. The Performer RPM is a high rise dual plane that works very well. The regular Performer looks almost like a stock intake and doesn't belong on anything other than a nearly stock engine in my opinion.
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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