rear main seal replacement 73 Dart 318 V8

Lasalle said

When you say "loosen the rest" do you mean the front main bearing cap only or all the bearing caps on the connecting rods?

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Not the rods, just the mains.
It probably only let's the crank drop a few thousandths but it helps.
4.0 Jeep engines have the same style seal, and I did HUNDREDS...