96LT1TX

I had a high RPM miss on the last run of the day last time I was at the track and someone told me to check my PCV system. I looked at the "line from the throttle body to the passenger side valve cover is the line that supplies fresh air to the crankcase" and the part that goes into the valve cover seems to be somewhat blocked... is this a problem? The line also seems cracked a little and is very used/abused. Could this cause a high rpm miss? This miss only happened once in 2nd gear and once in 3rd gear both at near 5500rpms... never had a high rpm miss until that one run, mph was like 1 mph lower than previous runs.

Any help appreciated.