A few quick words of wisdom. The MSD system is great for drag cars that require the Multiple Spark Discharge (aka MSD) but you need to realize that the box (6AL) will cost over $200, the dizzy will cost $150+, and then you will have to have the dizzy re-curved to make the car run like it should so add another $75-$125 to the total. (not saying it won't work, it just doesn't work right)
For under $250 Don (FBO Systems, www.4secondsflat.com ) at FBO has a system he'll run with any MDS system and beat. That's what I did and it really wakes up an engine. My 340 went from pulling hard to 5500rpm to rockin all the way to about 7800rpm. I've not run it any higher but when I shift it's still pullin.
Something to think about too is that the wiring is exactly as stock too. That much easier.