Does anyone have any experience with one of these engines? I am still looking for a replacement for the gasser in an Astro. The displacement of these is similar to the V6 in the Astro. How can I find out if it is a durable engine? and which transmissions would mate up to it? One of the major obstacles with diesels in a van is that the diesel engine tends to be much taller than the V6, hence more trouble to install. Do you think these engines would give me better mileage than the gasser?