[BobBray]

This is the way I usually do it: First, remove all the spark plugs and spray in a good amount of a penetrating oil, something like PB Blaster, Liquid Wrench, or Kroil (which is the best but expensive). Let it sit for a few days, spraying a little more in each day. When you are ready to try turning it again, drain the oil and filter (if the filter is a canister type drain but don't replace unless it's full of sludge, if it's spin-on, dump it out and put it back on). Put a few quarts of cheap 30W in the engine and pull the distributor and valve covers. Prime the oil pump, you can use a long slotted screwdriver with the handle cut off chucked in a drill down the distributor hole, turn the pump slowly clockwise until you feel a bit of resistance. Look for a little oil coming out of the rocker shafts around the rocker arms. Spray a little more penetrating oil in the spark plug holes, then take your breaker bar and try turning the engine clockwise first. Yes, you might have to hit it. If you get it to move a bit, then try back and forth working it until it's free. Get a longer breaker bar, 18" isn't much. Good luck! Let us know how it turns out.