My crank case has a mystery leak that won't go away.I also have a cracked pushrod tube that was ghetto rigged with some rubber hose and a few hose clamps. Another problem is it likes to sputter or jerk once it has been driven for a while,seems to be a common problem in older vanagons.
I gutted the westfalia interior and made a wrap around couch and had it professionally covered. Its the most fun to drive and I won't trade it for anything.
Your sputtering problem is a common malady. There is a wire harness that fixes it, per this web page:
http://www.telusplanet.net/public/gary2a/rack/afmharness/afmharness.htm.
Note: it's not my page, nor have I've never had this replacement done, but thought you -- or anyone else reading this -- should know.