Sounds good, dude. Glad somebody else is still experimenting with spark plug gap for fun besides me.
The only thing I'd be afraid of is at higher revs, the coil might not have enough saturation time to fire such a wide gap, as it will require higher voltage for ionization. Rule of thumb is the higher the rev, the higher the required voltage but lower available voltage. Not many modern systems have any problems with it (the STOCK TFI-IV system has 50kV!), but with some extra juice from the Accel (haven't seen the numbers on that), opening the gap could be your ticket. This is especially true for N/A combos. Don't go too far, because the spark will actually get blown out like a candle at higher revs. Watch your distributor cap for carbon tracking and accelerated contact wear. Again, glad you found this out, too.
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch