Mopar 360 Performance Shortblock

Has anyone used the mopar performance 360 short block non magnum assembly(#4876908-9.5 compression)? Is it really available or back ordered? I have seen it advertised for $1250 which when you compare to the cost of having my '72 340 block done locally seems like a good idea. What do you guys think-are they available and are they a good foundation? they are bored .20 over, cast pistons and crank, 509 cam, double roller timing chain-not inc/lifters. thanks