Hi, Ive got a 78' F250, auto trans, 4x4, with a 460 gas hog that won't pass smog. Rather than putting a valve job in it and still getting 5 mpg, I thought why not convert to diesel. So I'm looking for an 87-93 International 7.3 liter IDI engine. A complete vehicle would be ok if the price is right and location is Northern California. Can anyone help? Thanks, much appreciated.