I've heard the Blue Thunder heads are good. I've been trying to find out more about them on the internet but, I've not had much luck. The Dove heads look nice but I remember the old castings had a lot of porosity and would regularly fail pressure checks. That was a long time ago so I'm sure thats been fixed. I'm shooting for the 775-800 hp range so I'm wondering if the medium riser stuff will cut it. Thanks for the imput!