I have a 98 4-runner 4cyl automatic. I had a cracked head and I guess my son drove it a little to long with water in the oil. So I replaced the head and a month later got it running only to find that it had a spun bearing, all that work. A rebuild is running around $1500+ and who knew what cheap parts are in them or I'm thinking about rebuild the engine, which I may need some help. I'm looking to go as cost efficient and gas efficient as I can. Anyone know some good pistons and a good crank kit that I might want to go with. And is there any other goodies I might want to put in it to make it more gas efficient. thanks