Those are certainly solid numbers for a 2020 grad all around. The key will be getting an eval from a coach to see if they think it's the 6'1/220 that is the cause of the numbers, or if it's the 6'1/220 plus the skill set that is the cause of the numbers. What I'm talking about is the magic crystal ball of projections. Do his skills project out to develop into a D1 player? That can't be answered from stats alone. The stats right now are not D1. However, that does not mean he can't progress into D1.
The key will be finding a third party opinion who will shoot you straight. Going to a camp with 20 major D1's will probably not get you the feedback you are looking for since 76-80 will not put your son in the top half of their recruiting pool for 2020.
Going to PG to record an 80mph arm velo, and a 7.8 60 time will only result in one thing......going to another PG event to try to get the numbers up. Wait for PG until the numbers will really pop. You can also accomplish many of the same things by uploading a video to YouTube, and sending out your velocity in an email....these are also free and won't cost you a years tuition to "chase a ranking" from a showcase ranking company.
All around, the size, exit velo, and arm velo show that the boy has some ability. Worry more about progressing than being recruited. Good luck!