Good morning jim,
If you are going to all the trouble of converting to a 2.1L why not do the
ultimate conversion and put in a Subaru 2.2 or 2.5?? The cost will be about
the same but your satisfaction will be 100X better.
Our infant web site gives some more info on the conversion.
http://www.subaruvanagon.com/
E-mail me if you want more info,

Tom - the sticker guy
Burlington Ontario