318 magnum vibration.

Did the flywheel look solid (ie. no scallops cut out or weights added?) EVERY 318 was neutral balanced.
Chrysler Small block

• 318 A (POLY)-Internal
• 273-318-340 (340 to 1971 Steel Crank) LA-Internal
• 340 (1972 up w/Cast Crank) External
• 360-External

Chrysler MAGNUM Engine

• 318 (5.2) Internal
• 360 (5.9) External
• 5.7l, 6.1l, 6.2l, 6.4l HEMI- Internal