Need Some Smallblock Info.

I'm always seeing that you need to use a bronze gear on your distributor/oil pump drive when using a roller cam. This is because one of the gears will get chewed up otherwise. Is it the pump drive gear that gets chewed up or the cam gear? Why does it get damaged? Does this apply to all roller cams or just the aftermarket ones? Does the factory Magnum cam need a special gear too? I have a brand new hardened tip pump drive shaft that I bought about 25+ years ago. Mopar still uses the same part number, but is the part still the same? Will it work with a Magnum or an aftermarket roller cam? If not, what do I use, the stock Magnum part?

A couple more things & I think I'll be done. When does it become necessary to run a larger sump on the oil pan? If I have a street driven 360 that will see a max (very seldom) RPM of 6500, & usually far less, do I need to increase the oil capacity? A larger pan in my car will mean either a large loss of ground clearance or mods to the K member. Is a brand new MP pan with a windage tray good enough? Also, what is the difference in the 90* oil filter adapters. I read somewhere that the one for the 360 is different than the earlier ones. Will they interchange? I have an aluminum one. Is there a way to tell which engine it fits?