71/4 How Strong Really

I am thinking about driving to the street legal drags to watch, but have been thinking about making a pass or two with my very slightly modified 318 powered duster....(wife, kids and other matters have kept me away from bracket racing for nearly 30 years but am feeling like it may be time to try it again). I know these rear ends are very weak, but the car makes very little horse power, so just was wondering what you guys think.