While we don't usually work on Jags, this one kinda fitted the bill.
Jaguar XJ12 rear half rebuild by Real Rides
Apart from some rust repairs and external engine modifications, we were given a set of 17 x 12 wheels with 335s on them and asked to make them fit!

Jaguar XJ12 rear half rebuild by Real Rides
We performed an 80s Lister style rear half on this XJ12, extending the rear quarter panels by 75mm per side.

Jaguar XJ12 rear half rebuild by Real Rides
Jaguar XJ12 rear half rebuild by Real Rides
Jaguar XJ12 rear half rebuild by Real Rides
Jaguar XJ12 rear half rebuild by Real Rides
Then we made the rear bumper fit again and added some modified Walkinshaw sideskirts.
— Kayton Coughey