So I had the oil pan down last weekend to swap the rear main seal. I could see the bottom of the pistons and read what looks like "157-99" on each of them. I did not build this engine and assumed they were Keith Black Hypereutectic pistons. The last rebuild was around the late 80s/early 90s. I did a google search and it came back with one hit for that number and they claimed they were 12.5:1 race pistons. Pretty certain this motor is not 12.5 compression... The Keith Black catalog I found on-line did not have that part number anywhere close to the hemi piston numbers. Anyone have an idea of what brand they might be?

68jim