hey all this is my first lt1 engine and it has a slight problem. i just purchased the car and it was there when i got it. when it idles or you give it gas drivin all is god but when you are cruising around 60mph it has a slight miss, sometimes barely there and sometimes a little worse. i changed my plugs and inspected wires and they seem ok. could it be the opti, or maybe just a cap n rotor? i just ask cause befor i start taking the waterpump and all off i want to see if there may be something else im missing.