How do you know if your car has the larger crank pulley ?

I see some debate over the pulleys, what diameter is the Code3 ?

With the 20% off, is it worth getting the Performance Supercharger Pulley and the Intake mod package (package gives a $50 discount + the 20% off, comes to $599 shipped). How easy is it to install the pulley and intake mod ?

Also are the Phenolic Spacers worth the $$ ?

I haven't bought my SRT yet, but this looks like a nice deal and there's a nice group buy going on with a good CIA. With the Code3 pulley & intake mod and CAI package, it seems this would be a nice start on performance enhancements. Should bump the engine to over 400hp at the crank if the numbers add up for under $1000 if you do the install yourself (seems like it would make sense to do it all at once).

Thanks,
Brian