1/4 mile rpm?

I have a 69 dart I enjoy taking to drags. Re-living my youth. Go maybe 3-4 times a year. Well on my bucket list is attend and participate in a Big Mopar event or Musclepalooza at Lebanon valley. I have only been running 1/8 mile. I have run a best of 7.15 in the 1/8. Some of these events 1/4 mile. My redlite comes on at 5800rpm. But limiter set at 6200 rpm. 727 with 4.56 gears and 28 inch tall M/Ts. What will my rpm be in the 1/4 mile is my question. Thanks Kevin.