> engine but having some probs with the fuel injection I can't figure out,

If the ONLY problem you are having is fuel injection issues, I would
strongly suggest looking into megasquirting the van.
With megasquirt, you are in control of fuel and spark. Running the
engine rich to cool it down a bit is just a mousclick away.

Here are a couple links for you. The first is the megasquirt forum and
the second a dude who has installed one onto his 1977 westy.

http://www.msefi.com/

http://tbone2091.tripod.com/megasquirt/
(beware of popups since this is a tripod member site -- blech)