318 power?

That's pretty impressive. Auto or manual? What cam and intake? At what rpm did it peak?
There used to be two Dusters ran the 1/4 at EIS in Edmonton, Alberta, Canada. Both 340 cars and identical except color and transmission. One was stick and the other auto. One time the stick would win and the next may be the auto. They could switch cars to see if driver made a difference. Now reaction time is a big part. Transmission choice in the Mopars did not seem to make a difference. The other breeds was a different story, and the Mopar automatics lasted. All the automatic trans shops would have gone broke long before they did if all the automatics lasted like the Mopars. The Mopar weakness was fast idle and the R band.