I posted this in response to Inrergrated's request but I should have done it on the other 307 piston thread . Sorry. I don't want to make a mess.

Yes the pistons are all the same and it is a set of 8. I guess this part should be on the Swap Meet forum or in a PM.
It's the one with the valve cuts. LINK


"I wonder if God created man because he was disappointed in the monkey?" Mark Twain