Speedmaster heads are on and running.....

Jadaharabi said

So now you need to dial in the carburetor and then it will go 12.99?

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that cam with 204 duration @ 050 just isn't pulling. It's the right cam for 2.94's and stock converter, but a mismatched cam for the heads/intake/carb. It won't turn RPM's, probably shifting it at 4800 would be my guess.