If you guys dig the OP's car, check this one out:
However, I must take issue with the "1 or 2" comment - that's from Galen's Registry, so that means it's 1 of 2 known 440-4 Shakers in his registry. To the non-Mopar fans out there, Shakers are much more common on 440 Six Pack and Hemi Challenger R/Ts, but the single 4bbl. Shaker units were slow to trickle out to the public in 1970.
As far as the color combo, there's no way to know it's 1 of 1 because Chrysler's records didn't keep option combinations, but red stripes are quite rare for any color (usually found on white and black cars), and DY3 is already quite rare for the R/T.