if you plan on spraying out the hole you will need more than the nittos.
they will be fine if you dont hit the spray until after you leave the lights, but i doubt you see much gain, maybe a low 14 with a 1.9 60'......
245s are about all you can find in a 16" tire. they should be fine for you. i think with just some practice at the track you'll improve your times a good bit. you should be hitting 2.1 60' times now, so there is still 4/10th on the table just from better driving. you could probably hit the bottle in first after you get moving and that should drop you another 1-2/10ths........