MSD Box Change

[ksurfer2]

I recently purchased a car that is running a Programmable MSD Digital 7 box. As I research this, I see that it is not legal for most NHRA racing (i plan to start doing some NSS stuff). What is involved in swapping this box out for a MSD 6 box?

 

[ruffcut]

the box of course and a coil to match

 

[Shorthorse]

If your box is the original 7520 model you're OK but that's the only Digital 7 that you can run.