I was hoping you guys could help with this.. Have a friend who is interested in building a 450 Marlin build off a Savage action. He asked what all that entailed, but I wasn't exactly sure. To start I thought, a Savage 110 long action, the barrel, go and no-go gauges, a magnum bolt head, and magnum magazine to feed the rounds. My gut tells me I am forgetting something or is this correct?

Thanks in advance...