Max/Street Wedge Question Time.

So I picked up a set of standard bore 426 Wedge pistons today, and I'm having a little (ok, a lot) of trouble finding information on what size the dome on these is. All I've got is that the dome is ~ .200" tall, and they're stamped 2406649STD on the top. I'm assuming these are Street Wedge pistons, so they'd be around 11-1 compression, but I'm not sure. I didn't get a chance to see the block they came out of, or I wouldn't be asking this. All the guy said was that it was stamped 426HP on the pad.

Thanks in advance, I'm getting a hell of a headache trying to figure this out.