X2- I got an Aussie cast 6-71 sb Mopar blower manifold for $1500.
My all billet 8-71 blower was $3000 from The Blower Shop. Hard annodized case and rotors. The rotors are teflon striped. The case is a retrofit design and has a small delta shaped discharge opening.
14mm hard annodized BDS pulleys, idler pulley and a kevlar belt adds another $600 to this project.
On a side note, ProComp just started making cast sb ford 6-71 blower manifolds. ProComp also just started making sb Mopar alluminum cyl heads, maybe a cast sb Mopar blower manifold is in the works.