Your poundage is fine as long as you are shooting a solid broadhead and a heavy enough arrow for pass through. As dog1 said, the heart is lower and you have to stay back of that shield. A quartering away shot is best for you get behind that shield and into both lungs and heart.
I have killed hundreds with many weapons and I have seen them killed with less poundage. We have found everything from broadheads, muzzleloader maxi-balls and high powered rifle bullets in that plate on the larger boar hogs. So if you stay behind it, you will have fresh chops on the grill shortly.