Unfortunately the 3.3 block is already bored out as big as you would safely want to. At one time I was looking for a rebuilt motor or honed block to build up a serious drop-in 3.3 powerplant. None of the big rebuild shops will do it. They recommended a completely new engine for the above reason. Stinks for me! I wonder if there's a way to drop in the 3.5.... Might be worth looking in to.