318/360 hybrid

looking to gain anything. got the parts laying around and figured if i could gain anything, i should make use of them. I think the block that i took them off was a 92 but not sure. They do have the air pump holes and it had a hyd. roller cam. I probly would mill the head if i did it to increase comp ratio as high as i can get it. I would probly have to mill the intake also. How much of a gain would i get if any? :salut: the 318 is a 82