So Far = So Good at World Finals
No 440 Dusters in Stock eliminator, you must use an engine available in the car for the year. So all stock eliminator Dusters/Demons in the 10's and 11's are 340 powered.
1970-71 340 Fits in classes D E and F
And 1972-73 340 fits classes E F and G
A car can move up or down one class from its natural class. If it can get light enough to not have to remove any required parts. Helps to have a light weight driver. There can be bolt on ballast in the trunk and a weight box in the trunk to add weight to.