Rearend gears

I have a 1972 Dodge Dart Swinger with a built up motor Rear end does not have the right gears for a good 1/4 mile track/ streetcar. What size should I put in? Has a positrac and a 8 3/4 bolt rearend. What gear size /ratio fir bith tracj and street. I think 4 11 would be to much. It is a three speed automatic. With current gears will do 130-140 on highway but need suggestions for both street and 1/4 mile track. Would appreciate any advise I can get. Thanks