Having trouble finding these listed anywhere... they are in my .060 over 454. What is the valve relief size among other things?

Thanks,
Bill C.

Bill,
The reason you cannot find any specs is because that piston is not considered a performance piston. Most manufacturers give very little information on thier stock replacement pistons. If I had to guess, I would say the valve reliefs are around 5cc total. It looks very similar to the L2377F60 TRW's which are 4.9cc except that the H661CP is .015 lower in the block.
Hope this helps,

Bill,
Do you know how low it sits in the block? It does not look very deep! Also, there are only two small valve reliefs per piston... would that equal 5cc?? I was thinking more like 2 or 3CC's.

Thanks for any and all info!

Bill C.