Predictions?

Thats a way mild cam. with 10 to 1 you could run alot more than that.
12.8's on what you have, I think you have done very well.
for the hell of it try shifting at 6500 see what kind of times you get.
more gear,more tire,more cam and a decent intake such as a victor or a M1 you could be high 11's low 12's.