Congrats on the run
My 12.74 on stock turbo with a tune and built trans was a 8.0X on 305/50r20 nittos and also my first time ever at the track. 1.7x 60'. Only went out twice like that, ran a 12.76 on the other pass.
Drag radials help out for sure!!! You will be all over some 7.9's...