Doesn't look stock... (added PICS)

[chargd72]

I am disassembling my 318 for a rebuild and when I took off my heads there were valve reliefs in the pistons.  Are these stock pistons???  It's a '72.

[1BAD68]

if they look like this, then no they are not stock.
I'm pretty sure stock 318 pistons were just flat.

[chargd72]

Yes!  They look identical to that, minus the casting #.  Thanks for sharing  

I was told it was a stock engine, wonder what else has been messed with...

[chargd72]

Finally got to the garage and took some pics.  Looks just like the one that 1bad68 posted.  Anyone know what kind of pistons these are?  I would assume if there's reliefs the piston should be closer to the deck to add some compression 

[1BAD68]

Those are Sealed Power pistons, I think they are rated at 8.5:1 compression.

[chargd72]

I admire your recognition skills, thanks.