How to tell if pistons / head is stock? images inc

[mikecampafool]

So I'm trying to figure out if the head i have is stock or built at all? Also if pistons are stock?
https://preview.ibb.co/gMyydc/IMG_20180429_170305.jpg (https://ibb.co/fKEFPH)
https://preview.ibb.co/fJTydc/IMG_20180429_170324.jpg (https://ibb.co/hr3Wyc)
https://preview.ibb.co/cW2frx/IMG_20180429_170330.jpg (https://ibb.co/e4cDBx)
https://preview.ibb.co/na5Byc/IMG_20180429_170337.jpg (https://ibb.co/gRSfrx)
https://image.ibb.co/meXryc/IMG_20180429_170340.jpg (https://ibb.co/b1qddc)
https://image.ibb.co/feBUjH/IMG_20180429_170345.jpg (https://ibb.co/ekBjJc)
https://image.ibb.co/edE4Jc/IMG_20180429_170355.jpg (https://ibb.co/dbVN4H)
https://image.ibb.co/hOmJdc/IMG_20180429_170359.jpg (https://ibb.co/jZxfrx)
https://image.ibb.co/jS00rx/IMG_20180429_170437.jpg (https://ibb.co/htgjJc)
https://preview.ibb.co/kYfpjH/IMG_20180429_170455.jpg (https://ibb.co/n5FN4H)
https://preview.ibb.co/jPzRWx/IMG_20180429_170504.jpg (https://ibb.co/nrbjJc)
https://preview.ibb.co/fRLByc/IMG_20180429_170516.jpg (https://ibb.co/eukddc)
https://image.ibb.co/mqdLrx/IMG_20180429_170532.jpg (https://ibb.co/dbph4H)

[Kingtal0n]

looks all original to me

[ANDY black s13]

looks all original to me

Agreed numbers on both confirm OE parts

[mikecampafool]

Agreed numbers on both confirm OE parts


looks all original to me


Thank you both!

[Kingtal0n]

Also, 54C pistons are supposed to be (95-?)97-98 blacktop versions, supposedly better casting than the original REDTOP variety FWIW