Way to many variable to gather any useful information here if indeed that is what the original poster is after. But might be fun to see what kind of answers we get. I will say more often that not when we help guys with BB Mopars we usually find wherever it was they were shifting that it was to high. After a day of testing and tweaking we usually find they go faster shifting lower than they think they needed.

To more answer the question directly my old 572" Hemi we found it ran best being shifted at6400, went 8.77 that way at 3100lbs. FWIW I shift my 525" B1 at 83-8400 when we run it all out. The other motor is 499" and is shifted at 94-9700. But neither is your typical BB Mopar