The issue I see with this option is that SA builds the Super Snake, not the owner. If the only option for a budgeted owner is to build in levels for a final "Super Snake" at level three, the owner is going to have to send the car back to Shelby for each level upgrade, for my Super Snake build it was a round trip cost of $2400 from Fla. to Las Vegas and back. I don't know that many budget owners would "also" be interested in multiple trips to Shelby with their car.
I agree. What this would do is allow someone to get the process started with a "Stage 1" Super Snake, get a CSM# and registered in the registry as a SS, then finish it off themselves for much less than if they had to send it back to SA 1 or 2 more times to get Stage II and/or Stage III.
They'd be opening up a whole can of worms with that.
And besides, that's exactly what Jack Roush does with a Mustang. He makes a Stage 1, 2 and 3 Roush. Or he lets the customer do it by selling them all of the parts.