Rumblefish.
to get a junkyard motor is not easy or cheep we talkin many trips= maybe find what i want, plus the cost for a junkyard motor is 500-700 an i still have a junkyard motor...
It's not hard to find a good junk yard engine near you...
Here is a link to a nation-wide data base of salvage yards that you can search for an engine in your local area with low mileage (or any part)... Some may even offer a limited warranty and possibly ship, you can find one close to you.
My brother is an insurance adjuster and uses this site all the time. He showed it to me.
Keep in mind that if you get a truck magnum engine and put it in a car, you will have to change the oil pan and oil pick-up tube to fit the car. The hump for the truck pan is in adifferent spot and will not work in a car as it will interfere with the k-frame.