Are you looking for more power? Keep looking reed spacer's don't give more power. They will move your power band around a little. But most people will tell you they can't tell a difference with them.They do give you the extra clearence when you add a bigger carb.
yup, save your money. they arent worth it unless you absolutely need them for mounting up a bigger carb. put that money toward an adjustable timing plate or high compression gasket kit. you will get bigger gains from them and be happier overall.