crankshaft/flywheel encoder patterns

[RABBITT_Andrew at mv8.orbeng.com.au]

can anyone out there tell me what encoder patterns people are using 
(especially on production engines) and what sensors are used also?

ie:

Ford EEC-4's, 36-1 pattern, inductive crank sensor, hall effect cam 
sensor.

I'm trying to find out what's out there and how common-place 60 tooth 
encoders are.  (trying to justify a 60 tooth design).

thanks (in advance) for your help

Andrew Rabbitt
Orbital Engine Company