Gen III Hemi

My 5.7 block has been running at 700 hp for a long time, but the crank and rods are not stock and the pistons are 13.5 :1. As to rpm I shift 1st to 2nd at 7200 all the time and my Rev limiter is set at 7400 which I hit occasionally when I miss the shift. I've been told that stock shafts and rockers are good to 7500 and I've had no valvetrain issues revving that high since 2014. I have aftermarket cam lifters and springs. The aluminum heads flow great.