@rickdent I have been there. At 77 I don't think you'll have a surgery. Gleason 8+8 is high and your medical team, I guess, will try to block the testosterone to slow down the cancer. Lupron has some side effects but it is is the most efficient known to block the levels of testosterone.
If this helps you, I have the surgery 9/19/2015. The cancer came back on 8/17.
Since then, I have been with cancer; stage 4 since 6/2019. I am 80 now.
Good luck