I dunno, Jim, about your statement that you will never get as good a seal as
comes from the factory if you remove and replace a head..Maybe on the WBX
motor, that might be so, but the inline four..why not?  If they can do it
once at the factory and it lasts for years and years, why can't it be
properly done a second time?
 I thought, when I did mine, that it was dead-nuts simple!  I used every
assembly trick known to the auto industry(I hope) and it went right together
in about an hour, motor in the van..Well, I half-torqued all the new head
bolts in sequence and let them sit overnight and then re-torqued em half way
again, then once more around to final specs..A very simple little motor and
quite robust, with a good quality new gasket and clean surfaces..I guess I
can get a good seal if I use due diligence..We shall see if it lasts another
25 years till the next fool overheats it...
  Putting a motor into a van and then modifying the body to fit the
motor..that seems a bit odd..If you have to 're-create' the interior of the
van, why not use something really cool to power it then, like maybe a 944
Porsche Turbo motor, or a Valiant slant-six? Grin...How bout a LT1 Chevy V8?
That would get Benny Boy excited...There is a company that sells kits to do
that for the 914/911/944 Porsche cars, the V8 Chevy kit..
  Don Hanson