The heads were trick flow, I went to a local speed shop (the only one in town), He said that is what they were, the valves have a very short stem and need a job, also the geometry is bad so I am having that checked out. I am thinking about switching to edelbrock heads or sportsman II's. Which is better aluminum or cast iron heads? Sugestions appreciated. He said the trick flows are okay but flow above 7000 rpm also the aluminum is low grade and warps and leaks alot.