Stainless1 and Neil,
I have used MSD6AL ignition control boxes over the years with great success. They have a soft rev limit system and do a great job. The LSA engine and electronic control has coil near plug distributorless ignition. I don't know that there are aftermarket ignition controls that are compatible with the GM E67 controller. I took the car back to the tuner and he had simply forgot to increase the rpm setting. He chose to raise the rpm limit from 6,200 rpm to 6,600 rpm. In his experience the factory valve springs start to allow valve float at 6,700 rpm. Many aftermarket controllers allow soft rev limits by retarding timing and fuel before turning off cylinders or shutting the engine down, this controller does not. I plan to set the shift light at 6,000 rpm and the 6,600 limit will allow me cushion to shift before the controller shuts the engine down. Setting the shift light at 5,500 rpm leaves a lot of horsepower as the torque of this supercharged engine continues to climb well past 6,000 rpm.
I don't see this car on the salt as the aero is poor and modern lakesters are running almost twice the speed of this car. For now the mile and mile and half events are where we will be concentrating our efforts.
Thanks for the comments.