Best 273 and 318 builds (NO 360's please)

66fs said
The 66 is now a ballanced and blueprinted Commando with a E-4 Isky cam. The next 273 for the 66 Formula S is likely to be a ballanced and blueprinted +030 273 with TRW forged 2 barrel pistons, .

Are these some old stock TRW pistons? I could not find these anywhere, went with some Federal Mogul cast pistons.