hello all, new to mitsubishi, lots of experience with toyota though, i recently bought a 87' ram d-50 a.k.a mighty max, it has a 4g54 engine 2.6, the head has what is called the "jet valve" for emission purposses, which allows for the swirl affect, haven't found a whole lot of info on this, but i am looking at removing and plugging in order to raise compression, as well as put an end to running lean without adjusting the carb, simplely, can this be done ?