I contacted several Cam manufactures and asked about bronze vs. stock steel fuel pushrods with steel billeted cams. All of them said that I had to use a Bronze pushrod.They said I would damage the fuel lobe on the cam.
That being said, my engine builder said that mopar's have plenty of oil around that lobe and the steel on steel should not wear. However, I thought about going to a bronze pushrod. But I have heard that the pushrod could (rare) mushroom at the end and then you have a hard time replacing at the intervals you need to. You need to check the rod every once in awhile. They are sacrificial rods.
So, I decided to avoid the whole issue and go electric fuel pump.
I have too much invested in my engine to take a chance.