Predict gas mileage-A formula??.

[1Gary]

Well guys I went to car-part.com to look up 5.9 diesel engines for pricing.The yr range of 1994 to 1997 was what I looked at.Highest to lowest was $6.500 to $2,500 with the most engines selling price is $2,500.That is engine alone and what I have found is buying a crash donor is normally cheaper.Because of that,I don't see how a swap could have a end cost of $10,000.The diesel is looking more interesting. :-k