The lower pulley should be OK, Original Hemi's used a thincker balancer on the bottom making a special lower pulley necessary to maintain alignment.The recent production and race motors use the same thickness balancer as the 383/440, so the old pulley should be fine.
The bellhousing will work but the starter will not. It will need to be changed out for a RobMc starter or a factory Hemi direct drive. The common starter will not clear the exhaust, that is why the factory used the weird starter.
Everyone has a clutch they like, I am using a Ram clutch and Pressure plate, other people like the centerforce or Mc leod...