got this info from another board
Turbo Buick LC-2 (3.8) motor weight
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Thought some of you might be interested in this. I weighed my motor complete minus the tranny, converter and starter. It weighed 420-lbs with everything just (including wiring harness and ECM)as you would sit it in a Regal. I weighed the 200-4R seperately w/ a 10-in non-L/U converter. It weighed in at 162-lbs. Add those two together and you have a grand total of 580-lbs for the T/R drivetrain. I am going to weigh the LS-1 motor and wiring harness that I have tomorrow sometime. I will post those results as well. Cheers !!!
Jim C.