Excellent condition. Only 40K well maintained miles on them.
They are the Gen 6 Vortec castings so they will bolt to pretty much any big block Chevy and these have a tiny combustion chamber (milled) , so you get a nice bump in compression even with dished Pistons.
Excellent upgrade when you're doing head gaskets anyway or to give you a nice 25 horsepower boost on your TBI engine.
I also have a bone stock pair of them with low miles for only $400.
$500 for the pair.