1970 225 slant six parts wanted

Dear fellow MOPAR fans,

Thank you for looking at my ad. I have an original 1970 Duster (beautiful) w/ a 225 slant six at 52k miles. I am seeking performance parts for this car. Super six pack intake/exhaust, headers, small four barrel carb. What do you have that I need? Advice is also welcome. Not looking to race or drag but want to go cross country with dependable power. Thoughts?