3.9 Stroker

67autocross said

Did they ever make a 4 inch stroker crank for the 3.9 ...I went to start my 89 Dakota after it has been sitting for a few years and the engine is stuck...got me thinking that if I have to pull it for a re-build it would be interesting to pump up the torque a bit...

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Lacquer thinner mixed with transmission fluid (or better yet super creep) sprayed into the spark plug holes with an oil can.

Maybe, additionally, pull the oil pan and spray up into the rotating assembly. Should loosen things up. There are automotive ‘snake-oils’ that are so thin, they soak into porous metal, and that would loosen things up.