If I recall correctly, mine were not numbered. It was kinda like "guess and by golly". The area that I paid particular attention to was the bulkhead. I had seen some that were installed improperly causing wrinkles - ruined the look of the whole car. I must have measured-n-cut and set in place 5x's before apply the adhesive. Another thing I learned - you can use bbq lighter fluid and a rag to wipe off any glue that might spill on the carpet
Phil
427 Roadster, #4279436
FE Specialties FE
3:31 and Toploader (wide ratio)
Roseville (N.Cal)