I'd look on the car craft/hot rod web pages..
jeff smith and john lingerfeller(rip) built some mighty powerfull street type 396's with oval port heads.. that made killer torque that was flat as a table.. and they did it with parts no one wanted...
oval heads, 396 block... cast crank, 3/8 bolt rods/etc..
but tech is right.. to a point.. the bigblock torque will kill most of the parts behind it... If and when it gets traction..