Just for giggles, I removed all my MSD Stuff when the box I had went south at a track rental..Remember that day Chris? Well I carried a spare MSD box, installed it, car started right up and I ran some passes.
The next week the spare was out and the GM HEI setup was back, ran a bunch of 10.3x's on the GM HEI with an older msd module that I kept as a spare.
Since then I have the changed to the rev limited MSD Module that sleeps under the cap in the Monte, I have one under the GM HEI in my chevelle too. I also carry a new in the package MSD rev limited module as a spare and the old one as well.
Yea, it may clean up the idle on a race tune-up with the multiple sparks under 2000 ?? RPM, but a street tune-up should be clean at idle.
You have a very sweet car, hide the rev limited module under your cap (carry the old one as a spare) and keep the engine compartment cleaner and have less things to break and possibly leave you stranded.