Identifying pistons

I picked up one of the roadsters previous engines earlier this week (327). Trying to identify the pistons to get an idea of what CR will be w/ the 462 heads that were on it. From what I am told/find, they look to be some Manley pop ups...

 

12.5:1

 

I thought there were around 12:1.

Do you know what brand they are? They possibly look cast, but its hard to tell right now.

 

12:1 with a 65cc head... Forged True or maybe TRW's

 

Thanks for the info

 

You can usually find a part # on either the top,
or the under side ,,
then google it