Can I use B or C body manifolds fore better flow on my sleeper GTS?

No work on the heads yet. I need to disassemble both, cc the chambers, check the valve job, guides, change springs etc. At that I planned on sending them to PRH once I get caught up on the short block. Staying away from fully ported/CNC porting for reliability sake. I figure with nitrous and an extremely restrictive exhaust we will be conservative with ports themselves and focus on chamber, guide area and something else Mr Porter told me that I already forgot. Depending on how the deck height plays out I might soften the chamber a bit to help with detonation resistance and keep me in 110 leaded / c12 territory with 11:1 CR. I don't really know much about chamber softenin; I just read about it so any input is welcome. IMO the most interesting part about hotrodding is trying new things and measurig the results.

Fortunately we have a few intakes to choose from:

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