Stock ignition + Nitrous ??

[skiwesser]

I'm spraying 100 shot and it's backfiring on hard shifts, #2 plug stays wet with oil all other plugs look good I guess the oil ring on #2 is shot but all have good compression.
I've had problems with it backfiring off the spray but a new plug usually fixes it, it does it almost everytime on the spray but it pulls hard and never misses a beat just "BANG"......."BANG".
I don't want to go to strip like this but I will if I have to, I figure a bottom end re-build is the only solution but wondering if a MSD 6 would mabye light it, I,m almost sure fuel is loading up in header at high RPM's and exploding when I let the clutch out? sound right to you guys??
P.S. timing at 10* W/93 octane autolite 24's at .035 gap,
fuel is there with 190 lph in tank and wet system