New Best!!! 10.49 1/4 pass. In car video of run

With the mph/tire size i think you would be trappin' in the 6400/6600 range, depending on converter slip, if any. Not extreme rpm's by any means. The 4.10 may or may not give you much, but may make for a more comfortable top end if it feels like it's rolling over. Your car runs so strong i have a hard time finding something to point to. A little lean at the top or valve springs at their limit? But that's just stretching to find something....it runs really strong as is.