solid roller cam button / timing cover questions HELP

So I have a 500 inch 440 in a 65 dart tube chassis car and it was a mild supercharged build with eddy rpm heads and a fairly small solid flat tappet cam and I'm in the middle of converting it to a hotter build with Victor maxwedge cnc ported heads and a big solid ROLLER cam. I thought I had everything here to do the job but a buddy informed me that with a Roller cam I would have to run a cam button to keep the cam from trying to move forward in the block. He was a Chevy guy so he couldn't help me with the particulars but I guess Chevy have the same issue when using a roller cam. I have searched the Internet and read everything I can find on cam buttons and timing covers and fully understand why a button is needed . I have read that there is enough forward force from the cam to possibly flex a steel timing cover outward and in doing so the ignition timing can be affected. I have also read that some people weld a plate or washer to the outside of the timing cover I guess to take up the space between the cover and the back of the water pump to keep this flex from happening. I am also seeing nylon buttons, aluminum buttons and roller steel buttons and some look like they have a plate to hold them in the front of the cam and others dont. A metal bushing against a metal timing cover doesn't sound like the best idea to me either. And is the forward force of the cam coming from the drive gear for the oil pump? And can a high volume/pressure pump add more forward force than a stock pump? This is probably a way simpler issue than I am thinking it is but I have never done a big block Mopar before and want to do it right the first time. Couldn't think of a better place than right here to ask. What's the best button to run? Do I need something to hold this button in? Do the cam bolts need a retainer with bend over tabs to help retain them? What cover should I run ? Do I need a billet $350 cover or should I just run a stamped steel? And how about this, why did my new comp cams roller cam come with 3/8 fine thread on the three cam gear bolt holes when every other Mopar cam manufacturer only offers 3/8 course.... sorry to go on like this but these are my concerns. Thanks for any help