CROWNLINE BR 21.5 Great Boat Engine Needs Work

Its a great looking and riding boat, handles local rough water great. Boat is in good condition, some seats need some repair as well as large lounge in stern part of boat. Has a soft spot in floor, under the rear bench. Everything else is working great.I have all the original covers (one needs some sewing at seem ) Comes with Bimini top clear shieldTrailer has new brakes and tires, but trailer is not in very good shape, but is working fine at the moment, has torsion springs.ENGINE NOTE: Engine runs fine, BUT HAS A PROBLEM, CANNOT BE RUN WITH WATER!!! Did a compression check Cylinders: 1-170, 3-175, 5-150, 7-150, 2-175, 4-150, 6-70, 8-110.From what I have read head gasket needs to be replaced. Engine runs smooth, starts quick, but cannot be put in water, as it seems gasket on Cylinder 6 will leak water.