If you truely have the original distributor, keep it. After all, it was born with the car.
Mallory, Echlin and others make 'heavy duty' points that can take 7K rpm runs on a mild motor like yours. The key is to make sure the dist. is solid. Biggest problem with them is worn bushings, excessive end play and point plate wobble all of which can be corrected. Keep in mind too, that the engine wire harness and coil itself must be up to snuff for good performance. Don't overlook the battery either. You need at least 14V or better.
I suggest you send the dist. to Jerry MacNeish at
www.z28camaro.com. He does a nice job of 'blue printing' and I think you'll be pleasantly surprised with the results.