hey fellas, about 2 weeks ago i bought a bay boat,it had a 88 hp johnson on it ran great. I saw a small water leak on the bottom of the exhaust manifold and decided to change the gaskets,naturally a couple of bolts broke off. so i thought it smart to bring it to a mech. to get it fixed.he said he would have to pull the power head to fix it,and cracked the block.(where the 2 studds on the back of the block go from the block to the lower part)one of the studds stayed in the lower part.my question to you guys .can this be welded?or do i need another block?