"STOCK FACTORY EFI"
And, what does that mean?
Using the original electronics? How could they tell an EPROM in the original box?
Using the original hard parts? Larger injectors legal? After all, stock carbs are allowed jet changes. How about fuel pressure?
Are they even going to think about this until someone's 1000 hp GNX runs?
When was the last time someone checked all the above. If you have a Mega Squirt on your Production class car you are no longer production. Easy.
Drag out your 1000 hp GNX, lets see what she'll do.
DW