Old TRW pistons info?

Looks like they are for a 383, and should be around 13-1 with 78cc chambers and 11-1 with 88 cc's
There's and ad for a set on e-bay
http://cgi.ebay.com/ebaymotors/Forged-Mopar-383-030-over-Pistons_W0QQcmdZViewItemQQcategoryZ34202QQitemZ4634462010QQrdZ1