7 1/4 rearend

So I know its weak. But how weak? Will it withstand a few trips to the track? Got a 64 barracuda, 273 4spd w/ 2.96 posi rear end. Plan on either playing around some with the 273 or upgrading to a 318, nothing radical, probably wont go over 250-275hp. Plan on using old belted street tires. Would like it to be in the 14's.
So... will it last?