what size carb ?

If your looking just for more power, putting the Edel 750 back on and getting 3.55 gears to replace the 3.23 might be more noticeable. Depends how often and far you drive on the freeway. If like never, 3.91 are better still.

The 750 holley should make a few more hp over the Edel, maybe up to 20 hp.

3.91 gears might gain you a half second in the Q mile