thisis how. you have to resleeve the cylinders and then pop up the sleeves then make a spacer plate and weld it in, OR get a head designed for the sleeve pop up then set up all the porting and you have to be careful they are easy to break into the water ports. for the cost to do it i think it would be better to just save your pennies and buy the aftermarket cylinder when your ready they are out there. and they are rare but the ones i have been around RIP