Bypass computer for alternator with this:
Bypass computer for ignition with this:
There are other ways to do this, but these are pretty straight-forward, and if nothing else you can get the idea of the inner workings. Also, splicing in the Mopar Performance deal will keep the computer in the loop if you like things like air conditioning. Should keep the gauges functional too. If you just do the ignition and carb, the computer can still run the alternator functions as long as you do the wire splicing properly.
There's the Mopar Peformance M1 Magnum carburetor intake or the Edelbrock Performer RPM Air Gap for Magnum. There's also a cheaper Chinese knock-off, can't think of the brand. Get what you pay for.
100 shot of nitrous is pushing it.