360 heavier then 318?

The weight difference between the 318 and the 360 may be insignificant if the 318 had a cast iron intake and the 360 has an aluminum one.

Per chance, while the engine was out of the car did the T-bars come out? The bit about bouncing the car up and down or moving it back and forth helps the front wheels get re-oriented with the pavement better. It's fairly standard practice with any independently suspended front end. Without this, it's impossible to get an accurate wheel alignment reading.