Nice find, congratulations! I agree with the Magnums, or 15" Rallyes, if you want a stock look. I see some weirdness on the firewall, and with the dash vents, I wonder if it was an A/C car with the firewall converted to non-A/C. I don't think the center vents would be standard equipment in '70. The ft seats are '68 Charger, and worth some $$$ if they're nice. Ditto the 440 Six-Pak setup if you decide to swap a 383 back in. Were the Rallye gauges standard in '70, or were they optional?
If you don't mind a suggestion, the ignition coil's mounted in a high-heat area.