Robert, with your boat and your setup, most likely you will only run one or two per side. Start with one. A typical core setup would be 20' 20 pound leader, 5-10 colors of lead (1/2-full core). 4' of 30-40 mono (to hook the board to) then 450' of power pro (or similar).
Attach lure of choice, let the leader and core out, attach board (both front and back ), let 100'+- of pp out and put in holder. The board will bring it out to the side.
NOTE, let the 100'+- out the back of your boat before engaging the real.
If you don,t let enough line out, the core and diver could get tangled together.
I bet at least %90 of the guys out there are using the Church Boards.
One other note. That weight on the bottom side should be slid forward to+1
when a fish hits, it will pull the rod back and double your rod over. Let the fish take line as needed.
The board will usually stay attached (they are adjustable), some times the come uncliped and slide down. Most often when they slide down and stop at the knot that hooks the mono to the core.
It's a good idea to hold your pole close to the water when trying to get the board in. this allows it to skip across the water, making it much easier to get in.
When the board is whiten reaching distance, unclip it from the line.