swapping electronic ignition to MSD

[charger2fast4u]

i'm swapping my current electronic ignition in my 73 440 challenger thats a orange box now see pics for a full MSD ignition 6al2 ign box, blaster 2 coil, billet distributor #8546 and firecore wires is there anything else i need for the swap in parts? or is that all i need before starting to change them. can anyone tell me which orange box this is? came on it when i got it

[Ghoste]

You may need a tach adapter.  (if you have one of the many incompatible tachs that is)

[charger2fast4u]

I have the autometer mini monster tach so it should be a plug and play there do I need the distributor gear or can I reuse the old one without any problems