I need to improve my 60' time.

Yep, slicks are a dead giveaway. Now, gotta beware of somebody on drag radials too. But the worst are the sleeper guys that race in "hard tire" classes.

A friend of mine races hard tire. 220 rating, no drag tires of any sort allowed.
His sleeper is a first gen falcon, with a 235 tire..... and a 408"small block windsor, with a Itty bitty blower... and not much bottom end torque.
Solid low 6s eighth, on tires I couldn't run 8s on.