Never heard of running a "brass tip" fuel pump push rod. Nor have I ever had an isue w/ a stock on wearing out. If this is for a "race" application you should probably re-post this in the race section. The company you bought the cam form should be able to give you any info you need to complete your build. FWIW most of the guys I know that run roller cams run electric pumps, but then agaiin they are pretty much race car that see limited street use.