Just wondering about your numbers here.....410hp rwhp w/stock manifolds? = approx 471fwhp@ only 15% loss, 471fwhp@3645lbs = 11.5's@116 with a car that hooks.......My old '71 340 Cuda 3550lbs w/me ran 12.4's all day @108 = 364fwhp.
Perhaps you made a typo and should've put 11.40's ?