Need some advice 318 POLY vs 318 LA

The scales I used were cheap and I wouldn't be surprised if it was out by 20 or 30 lbs.
From memory the period articles I've read discussing the transition from A engine to LA the weight difference was always about 45 lbs. With the starter, fan, alternator it could run close to 600 lbs but folk who say they pulled out a poly and dropped in a 440 and the nose went up without touching the torsion bars are tripping.