swapping a 440 into a a body

Josecuda said
Brake improvement such as a disc brake swap is a must to have in a Big Block A-Body. You could either get the disc brake setup from a newer 73+ A-Body or from the aftermarket (Wilwood, MP Brakes, Scarebird).

Smart but not a must. I drove mine for 12 years with 4 wheel manual drums. It stopped. I now upgraded to wilwood's through RMS.