Im happy with how far she's come. I backed it with a 6.64 but I shook the tires pretty hard. Hope to do some more tuning and see what she does.
Stage 1 PRC heads
Stock Bottom End with 130k
If you are shaking the tires try running more air pressure in your drag radials , stiffen up your rear shocks a click at a time til it goes away. If you don't have adjustable rear shocks you probably need to get some to optimize those radials. What size drag radial is that , air pressure , and do you have adjustable rear shocks?