Goodbye Torqstorm, hello Spoolius Ceasar
That plug looks extremely safe. You could probably add 2-3 degrees to your total. From some quick math;
30 less .5/psi after 2 on 7.1 psi.
(7.1-2) x .5 = 2.55
30-2.55=27.45 degrees.
I’d lock the timing at the track and play with it in 1 degree increments for best mph. Don’t worry about ET just run it out every time. Then build a new curve to get there for street driving.