I probably have a pretty similar combo except maybe a little less weight but a low-compression 440 with a hydraulic cam and stock 452 heads.

I can usually get a bunch of 1.68-1.70 60 foot times. If it does a 1.70 and above, I can feel it spinning.

What kind of springs and shocks do you run? Is there a front sway bar hooked up?

I'd try some bias ply D.O.T. slicks like the Hoosier Quicktime Pros to see if that helps the 60 foot times.