finally ran the car at the track

I only got one run at englishtown, the car ran 13.1 @ 102 mph. the car is a 1969 plymouth valiant. 390 hp 408 " stroker, 904 trans and 3.54 dana. The car weighs 3475 with me in it. I ran bf goodrich street radials and they really suck. I'm happy with how hard the car pulls all the way down the track, but i had to launch at 2000 rpm and ease it out of the hole. what do you guys think? What would be the difference with drag radials? Most people at the track tell me i should be running mid twelves, is that realistic?