Could you post more pics of the aluminum in the crossover port in the heads? I have never heard of this. I am building a 340 and would like to do it to my heads also. Cool build, the car looks good.
Let me see what I can do. We just installed the valves so it will be hard to get a good shot but it is a good way to add 10-13 horsepower by making all cylinders run evenly.