360 LA OR 360 MAGNUM WHICH IS THE BETTER BUILD

Not always the case. Sometimes it’s a project motor that never made the project.
And sometimes they took the time to pull it because it was the only thing good on the rust heap the was hauled to the junkyard. Then they say "if I ever get a XXXX, I'll put that engine in it".... but they never buy so the engine sits for 7 years in the corner, until they post it on marketplace. But many engines are still in the vehicle and a person can hear it run.