I am getting ready to do my heads/cams this fall after the season finishes up. I have non PI heads and i plan on running boost through the car. I know the PI swap increases compression, and i don't want that. I do want better flowing heads, though. Would it be wiser to port/polish/3AVJ my current heads? If so what would i be looking to spend for the machine work (i know what the cams/springs setup already cost)? While Im on the topic, i hear headers are easier to do with the heads off the car, does this deem true for Long Tubes as well? Any input would be great. Thanks!