I just called a guy about a 1985 vanagon that he has for sale.  He said he removed the AFM and wired in a GM mass airflow sensor.  He said he now gets 26-27MPG.  He indicated there is a little black smoke at startup, otherwise runs OK.  Has anyone heard of this mod?  What's a good price for a used AFM these days?  Maybe the van will need one.

  Clint