89 w/4.0 swap not starting

[sauce823]

I bought an 89 danger with a 4.0 swapped in and it's been running fine till stairway night when I stopped for gas then it wouldn't start. The starter would get maybe one turn and that was it. Tried jumping it with a car, a 1500cca jump box and charged it over night and still just the one slow turn. Anybody have any ideas?

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