I suggest you put a couple ounces of ATF in each cylinder... Let it set a day or so and then put a socket and breaker bar on the crank.... Don't force it... Just try to get it started moving.... If nothing give it another day or so.
DO NOT try to rotate it... Instead rock it back and forth....
1/4"... Then more more more.... Just a little more each time till it goes a full revolution
Once it goes a full revolution turn it by hand 4 or 5 times ....
Then put a towel over each head to stop ATF spraying out the spark plug holes and hit the starter for a second or so.... Repeat a few times and put the plugs back in.
Turn it one more time by hand, change the oil and then you are ready to start it...
Only crank a few seconds at a time and if it starts kill it within 15 seconds.... Allow to cool and repeat running a few seconds longer each time....
The idea is to polish out the rust without allowing the pistons to warm up and expand untill the bores are clean.
After a dozen run cycles change the oil again and run it till warm....
When you get it in the water treat it just like a new engine break in and change the oil after about 10 hrs run time.
If at any time you notice ticking kill the throttle.... A stuck lifter is an easy fix but it it comes apart things can get worse fast.
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