small block heads

I did some checking on these heads and the seats on these were ground to 340 specs. They are set up for the 2.02 valves. It talked about these in the Mopar book I have. said something about the old valves 3690230. I thought it took the bigger valves when I looked at it. when I ran the number, it showed a 360 head but that head had the 1.88 valves. so I guess these are essentially a 340 head.