At 11:59 AM 5/1/2011, Rocket J Squirrel wrote...

>One is the 333 365, the other is the 333 369. They have very similar
>prices and seemingly the exact same specifications:
>
>For use on 4,5,6,8 cylinder application engines with standard
>coil ignitions, most square wave electronic control ignitions
>with tachometer output terminal, and alternators with "w"
>tachometer terminal.
>
>333 365 is 4,000 RPM (400�1300Hz)*
>333 369 is 4,000 RPM (800�2400Hz)*
>where * = For Alternator use only

Since you'll presumably be connecting to the 
coil, the alternator range won't matter - that's 
for diesels, or maybe cars with coil-per-cylinder 
ignitions, where it might be easier to connect to 
the alternator or an impulse sender.