355's to 391's how much does it help?

j par said

I have no trouble with any burn off's !! 4 speed and all. Mostly strip, some street, and very little high way.

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Did you ever change gear and any et change my firend had a 340 727 71 dart ran 12.7 with 355 and swapped to 391 ran 12.35 ish. Really depends on if your motor makes good hp through 5500-6000, 391 gears and 4 speed is the ideal combo imo.