I just posted these 348/409 exhaust manifolds on Ebay at starting at $9.99 each with NO RESERVE. These are true 2 1/2 inch outlet passenger car manifolds and are like hen's teeth to find. I know this is not really an Impala website but these are factory high performance parts and they may find a home here. The dual point distributor can also be found in my other auctions.
Here are links to the auctions:
3767583 LH Manifold CLICK HERE
3767584 RH Manifold CLICK HERE
Thanks and good luck,
Jason