eddy's tuning differ from j's

I'd knock about 4 - 6 degrees out of the timing. Start with 4*'s.
If you have a track thats open nearby, back off till the ET drops.

What gasket did you use under the carb? The paper thin one? If so, try a thicker OE type gasket for heat protection.

The Edel. heads have a slightly bigger port volume than a stock J head and will require a tad more gas. The larger port also slowed down the velocity.