If you had found this place earlier you could have also saved a lot of money on the pump. A 1.5HP, 10 GPM pump is made to pump from as deep as 620'. Your pump is only set at 198', and the water level maybe 20' from the surface. Pumps only lift from the water level, so even though your pump is set at 198', it is probably only lifting from 20 to 5o feet. The water level needs to be at least 100' deep and the pump needs to work above 50 PSI for that pump to have enough back pressure to keep it from up-thrusting. Might need to put in a 13-14 GPM Dole valve just to keep the pump on its curve. If you know the pressure on the gauge while you were testing the 13 GPM flow rate, I can figure the actual water level?
Best case scenario for a Cycle Stop Valve is if your water level is at 180' deep. A pump that can build 620' of head, lifting from only 180' will have 440' of head left. This would make 190 PSI of back pressure on the CSV and pipe. While that would work with a CSV1A set for 60 PSI constant to the house, it is still 5 PSI more than we recommend for the CSV1A. If your water level is higher than 180' deep, it will put another 1 PSI back pressure for every 2.31 feet the water level is higher than 180'. In other words, if the water level is worst case only 20' deep, there would be 260 PSI back pressure on the pipe and CSV, which is more than they can handle.
A 1HP, 10 GPM pump would have been a much better fit for this well, and would have worked fine with a CSV if the water level was 20' or 180'. The 1HP would also have cost much less, used less energy, and lasted longer. But it is very common for a pump man to just stick in whatever pump he has on the truck, or sometimes just because it is the most expensive choice. If your drop pipe is Sch 120 it can handle the possible 260 PSI back pressure from the CSV. We would just need two of the CSV1A valves to stair step that 260 PSI down to the 60 PSI you need. The first CSV1A would bring the pressure down from 260 PSI to the CSV set pressure of 150 PSI. The second CSV1A would see the 150 PSI and bring it down to 60 PSI as needed to use with that tank and a 45/65 pressure switch setting.
As long as you have Sch 120 pipe that can handle it, that 260 PSI back pressure would be good for the pump. That pump needs at least 86 PSI back pressure to stay out of up-thrust. If the water level is high that would require a 80/100 pressure switch setting to stay above 80 PSI all the time. You would at least need a 14 GPM Dole valve to add more back pressure if using only a 40/60 pressure switch setting as needed. Adding two of the CSV1A valves would keep the pump out of up-thrust without needing a Dole valve, would give you strong constant pressure, and keep the pump from cycling itself to death.
A pump that is way oversized and made for 620' when the water level is less than 200' is the hardest job for a CSV to do, and requires lots of figuring like above. But because the pump is way oversized, adding the CSV's would make the pump think it was at a depth that is much more suitable for that size pump.