What's that equate to at sea level? I think NHRA's site has the factor they use. If it comes in at mid-15's, you are fine. I wouldn't go tearing the car up yet. Also remember, hot and humid doesn't make for good times (what was the weather that day?) and track conditions could also be worse than other tracks. You can't compare numbers too much unless they are the same track on the same day, really. I'm spoiled: I have a good sticky 300' elevation track within about an hour of me.
Other than that, I would concentrate on your 60' time. That's where all of your race happens (unless you make a mistake shifting later down the track). It took 5 trips to the drag strip before I got the hang of it. Shoot for 2.3x or lower. 2.535 can definitely be improved on. The launch is truly the biggest skill in drag racing for ET. R/T doesn't matter unless you are actually competing, but that's skill #2 to master.
