I had the 318 in my '65 Formula S rebuilt by a local shop, but I don't remember seeing the combustion chamber shape at the time (more than ten years ago) Cylinder heads were change by a previous owner (and the block obviously) and are not original to the vehicle. Just wondering what i have? Thank you.
You have a 318 not original to your car, but we don't know the year of the engine or the head numbers. No reason to guess what you have and whether you have open or closed chambers. It doesn't really matter at this point.