If I am looking at this right, I have dome top pistons with +3.3cc piston volume? If I remember correctly, they did look like they had a dome top.

 

Eric, the “dome” you have is basically canceling out the valve reliefs, making this a true flat top piston, per say. In other words, you have 3.3cc worth of reliefs, and 3.3cc worth of domes. Very common for compression engines.
​​​​​​…..edit….who made this piston?

 

CP-Carrillo.

 

Now I want to take an engine building class. So, this whole process has me wanting to take tuning classes, welding classes, and now engine building classes. hahahaha. I guess I know what I want to do when I retire. Too bad that is still at least 15 years away. By then the car might be on the road.