Just happen to have part that could solve the problem, check out chrysler part number for the drivers side factory stock manifold, is it 3751068-2D made on 9/21/1972. it's cast iron but was original stock to make the big block fit in the A body.I have a complete set, cleaned, bead blasted and ceramic coated for heat dissipation
that was going in the next time but have decided to use headers instead.
Oh yea, its marked as made on the "dayshift" if that matters? LOL Arnold
