I have a very nice pair of 40 IDA 3C and 3C1 for sale as I am looking for a pair of IDS for my 67S project.
If interested send me an email and I will send you high res pictures. kjelltbrekka@gmail.com
30mm venturi. Sorry no manifolds, filters or linkage.
Price $2500 included W W shipping. Or part trade against a good pair of IDS.