Just loosen one at a time and try a little to turn it over.
You should turn an engine over after each main cap or rod cap is torqued DURING assembly.
When doing it that way, you will know where a problem is AS YOU ASSEMBLE cool
Saves a lot of frustration in the long run.
Did you mic everything before assembly?

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!