BluePrint Engines? Experience?

Anyone have experience with BluePrint Engines? http://blueprintengines.com/
I am lookin at gettin one of their 408 stroker block kits http://blueprintengines.com/index.php/chrysler-408-shortblock-specs-bp4080
Was wondering what you think about them and any feedback from those who have used them.

Also would I need a forged crank for a 4 speed? I would love to change dart to 4 speed down the road
Thanks