I have an opportunity to pick up a brand new in the box set of Edelbrock heads, part number 60929, which are the 84CC heads for a very reasonable price. I am likely not going to touch my shortblock as it ran fine prior to my restoration and was rebuilt by a shop about 5 years prior to pulling it off the road. The motor was built to stock specs for a 69/70 six pack engine, pistons, rods, etc. Here is my question, I dont really know the actual compression ratio, but since it was built to stock specs, Im assuming its stock so Im wondering if this is the appropriate head for this motor, or should I be looking for a different CC head? I know Im giving sort of vague information, but I never calculated the compression ratio..Thoughts anyone?