69' Dodge Dart Resto/Upgrade in NY
After research I found out those are 69' Mustang seats. So I'm using them until I can find the real deal.
Brushed off the pistons and it looks like they are .030" over. Good news!
I'm going to take it to the machine shop once my guy gets back from an elk hunt and have it checked out to make sure the block is usable and not too thin (he says some 340's can be too thin in spots...)