What,s a good RPM to launch a 4 speed?

I'd say 8500 and side step the clutch. Just kidding. If you running slicks and hooking up good, I would start at 5k and play with it Plus or minus 500 rpm till you achieve your best 60 ft time.
5000rpm is gonna make me nervous about breakage?LOL!I might start at 3500 and go up in 500 incramints til it feels right or breakage.I know somethings gonna give,but I,d like to just get some good hard launches a few times.Don,t want to pound this car much anymore,that,s what I got the 66 for!