Did you have to do any machine work to the pistions to get them to work with the trickflow heads? I am running a stock bore, stock stroke 360 magnum in my 91 dakota sport, that has the trickflow heads. I am right at 11.1 compression now. I am wanting to raise the compression and switch to E85 for my dakota race truck. Sounds like the icon pistons will work for me. I look forward to hearing how your engine runs. Sounds like it will run hard. What ET are you hoping to run with it?