You might consider just a 100 hp shot of nitrous instead. Any supercharger setup that works well needs an intercooler for best results. 740's have poor access to good cooling in the front. Once you add an intercooler in front of the rad plus your a/c condenser you might be in for trouble on a hot day. Plus the added weight will be a minus. If you decide to add a non-intercooled supercharger you will most likely be plagued with pre-detonation, pinging, non-forged pistons coming apart, bent rods, mad wife, no money in the checkbook, divorce,etc.
Just my 2 cents!