Old TRW pistons info?

I have the same set of pistons. They are rated at 12.5:1 with a closed chamber head and 11.8:1 with an open. The tops can not be machined to reduce the compression....My solution Edelbrock heads, the Aluminum allows for more compression before detination becomes an issue. That number is for a 30 over 383. Trw makes a domed 440 piston that is similar L2295 if memory serves.

Funny ....a Google search on that part number got me to this sight, I had to register to reply, but I am a B Body guy...I hope taht I don't get too much abuse on an A body ONLY forum...LOL :