"Not sure if this is a misfire but when cruising on freeway roughly 60-70 mph 2700 rpm I feel a slight hesitation not major just enough to annoy me where should I look first??"
Are you saying that the engine misfires when you're cruising at a constant speed and when you start to accelerate you get a slight hesitation. Or are you saying that the car is misfiring as you cruise at a constant speed. I ask because my car would hesitate (when I would try and accelerate) when I was cruising at a constant speed. Once I got past the hesitation it ran great.
Turned out it was running lean, had to change the metering rods (Edelbrock) until the hesitation went away. In your case it would be the power valve (Holley) I believe.
But I guess it could also be the gas blend or octane?? Do they sell octane booster, that would be an easy trouble shooting method without having to drain the gas.
Treblig
