You REALLY need to give more info than that! Which AFR, which Trick Flow, what is the rest of your combination including displacement, compression, intake, cam, fuel system, etc. Supply more info and it will be a lot easier to help.
It is a stock short block with 0 miles on it cobra intake with a 150 shot. as for what model heads that is what I am asking im not sure what model to look at but i want something that will also work on a 331 combo that i have planned for next winter. I also have a aeromotive full fuel system on the way.
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