[427SSSS]

So the width of the Stallion on this website states: "76" rear width".

Cobra "http://www.cobrakit.com/Specifications/Specifications.htm

And then on another site: "West Coast Cobra still sells a kit very similar to the old Stallion."

I found, in Paul's notes the attached two pages of notes, hard to read the handwriting, but interesting, nonetheless.