SFconflagrationcanine is giving you the correct scoop on springs with roller cams. They will not last forever. I would add that the more
oil you can get to them to cool them, the longer they are likely to last.
Additionally, you should check if your steel roller cam has a cast iron gear pressed on it. SF is correct about the bronze distributor gear if the cam gear is steel. But the bronze dist gears go away pretty quick. If the cam has the special cast iron gear option, you can run the standard distributor gear which will last effectively forever.
I have run several engines (currently have two - one for 13 years) with the cast iron gear option on steel roller cams with very good success. This option has been around a long time (at least 13 years from Crane), but it seems some folks still do not know about it.