Wouldn't this work?The Type II tests for spark on the coil simulator up to 8000 RPM, but the spark output is less than the stock Delco coil system. I personally wouldn't use a Type II system on my car. They are probably OK for bone stock cars, but definitely not intended for performance as evidenced by the reduced spark energy.
For what it's worth, if you need to have a replacement on hand, don't use anything but an original DELCO unit. Aftermarket ignition modules exhibit problems in high output, tach signal, cam and crank voltage levels, and so on. The Caspers LED cam cap will likely not function properly on aftermarket replacement ignition modules.
That said, GOOD LUCK finding an OEM module anymore. If you're determined, you will find it.
http://www.nos4gn.com/servlet/the-879/Buick-Grand-National-ignition/Detail