M90 is designed for cars from 3.0 L to 5.0 L in displacment.
A Ford Lightning uses the M112.
M45 is designed for cars with between 2.0 to 3.0 L in displacement.
M62 is designed for a 2.5 L to 4.0 L engine.

For more information: http://automotive.eaton.com/product/engine_controls/superchargers/superchargers.asp