I have a few pair of manifolds that fit dual barrel Weber or Dellorto carbs. $45 a pair.
They have been sandblasted clean inside and out. Note there are dual drilled types and single types.
There is one pair of short manifolds drilled for 1.7-1.8 heads and one set for 2.0L heads.
Both pair of tall manifolds are drilled for both patterns.
The tall ones are better on the high end and short ones better on low end performance.
I can hit them with the wire wheel to bring out a dull luster to the aluminum.
$45 a pair plus shipping. New ones are about $90 a pair at C B Performance.
Bruce