For what it's worth, there was only ONE U-code 440/727 Challenger R/T known to have been built in '70 (according to Lord Galen), it was an interesting color combo of DY3 Cream with a V1W white vinyl top, V9E red bumble-bee stripe and a H6E4 red vinyl interior. I remember seeing a picture of it for sale as a non-running project in Canada a few years back. I wonder if anyone here knows the car? Strangley except for this one, all 4bbl R/T's in '70 were 383 or 340 cars.