I have an '87 Vanagon with 180k.  The heads are real bad and it won't pass
CA smog test.  I don't know enough to tell if these are related.

One mechanic told me I should go ahead and replace the whole engine since
it would not cost that much more than a rebuild.  Another mechanic said
that was stupid, and they both seem like good mechanics.

What to do?

-Verne