I had a very similar combo that on 245 street tires and with a 4-speed/3.55s went 106 in the quarter@3650 pounds. The Wallace Calculator points to 330 hp, so you might be bang-ON!, except ..... yes, I was shifting at 7000, lol.
This was a one-run deal with street tuning. It was a 2.5hr ride to the track each way so when it went 12.9 I did not care to know any more.
