I'm not so sure it says empty weight of 1500 IBS,, It says "take off" weight followed by the performance results. Not that I know much about these things,, But typrical engine is about 250 IBS,, take that off your 150,, Now add in a Subaru,, weighting in at about 265,, to create new empty weight,, so still about back to the same spot you started from with 0-200 engine.
