Rear gear help

Don't know if this is the right place for this question....but...I'm putting in a 416 stroker with a 4 speed behind it...just wondering what gear with Sure Grip should I go with.I have a 8.75 rear with a 489 case..will be driving the car somewhat to shows that are freeway driving away..and some crusing..but if someone pulls aside and wants to play..want to make sure I'm good to go as well...any suggestions would be helpful

thanks....wayne