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The surge has nothing to do with the timing, its your carb. Could be many different things, Im not a carb. expert. Seems to me that 38 degrees total is too much. My strocked 427 (454) made the most power at 33 degrees total. This may be due to the porting that was done on the heads and intake. The more efficient an engine is, the less advance you need. I am also using Edelbrock heads and intake, 10.8 to compression, but a sligtly bigger cam.
Jeff
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