I have made up my mind to bike one half of Skyline Drive. Here is my concern; It seems that when I am biking an 8% grade my heart rate is in the mid to high 130BPM range. According to a V02 test that I took recently my peak AT is 163 with a V02 peak of 27.9(ml./kg/min) Skyline drive has long grades with at least 8%. I am sure my heart rate will be at least 130 and above for an extended period of time. I am a 56 year old male. Is this a do able task, biking the drive with an extended heart rate such as this? I maxed out at 320 watts. Thanks for any input.