Old TRW pistons info?

I have an old set of TRW dome pistons # L2293, can anybody identify them? What compression would they make with a stock 906 head with 0.10 shaved off. Cc`s unknown. What cam/valve lift could be used with them? I`m thinking of using them if I can get more information about them. This may be too much work for anybody but any info would be greatly appreciated. Thanks.