The main bracket where the alternator is mounted is in fact a stock early A alternator mounting bracket! I probably have 4 or 5 laying around. I cannot clearly see the adjusting bracket so I don't know about it.
You also need to do something to get those spark plug wires up off the exhaust manifolds or they will burn very quickly. OEM mopar valve covers had tabs with plastic wire looms attached to keep the wires pulled away from the manifolds.
