V-8 Piston Identification

[dpson]

I was given a set of V-8 pistons with rings that supposedly came out of a NOS or rebuilt V-8 engine that was damaged beyond use. These are dished top pistons and each has the letter "C" marked in white paint on the top. The pistons have the number 1558178 cast inside. I can't find this part number in the parts book, so I assume it is a casting number. I believe they are from a 289. Does anyone know what year/size these pistons are? Thanks.

1960 Lark Convertible

[Roscomacaw]

dished top should be a standard 289

Miscreant at large.

1957 Transtar 1/2ton
1960 Larkvertible V8
1958 Provincial wagon
1953 Commander coupe
1957 President 2-dr
1955 President State
1951 Champion Biz cpe
1963 Daytona project FS