I have started rebuilding my '69T motor and have significant history on the car. According to the documentation the motor was rebuilt in 1977 in California, unfortunately there are no details of the shop that completed the rebuild, only an invoice with basic information. When I pulled the heads off it looked as if there were interference between the pistons and inlet valves. I am curious if higher compression pistons were installed with the last rebuild, and clearance were not checked? See photo's attached.
I would also like to know if the 103 stamping is the compression ratio?
