Chevrolet small-block V8 swaps were very common with the Jaguar XJs of the 1960s and 1970s, since an ordinary 350 would make power similar to that of the 326-cubic-inch V12 and parts obtainment was much easier.
Still, swapping in a reliable-if-oil-leaky Detroit V8 didn't solve all the Jag's reliability woes: the Prince of Darkness retained a powerful grip on this car's soul.
The patina on this car suggests decades spent forgotten in an outdoor storage area somewhere.
There's a AAA map of California from the 1980s inside.
This car listed for $20,250 when new. That's about $87,500 in inflation-adjusted 2018 dollars, but still $5,000 cheaper in 1977 dollars than a new Mercedes-Benz 450SLC (and a grand more expensive than a new Cadillac Fleetwood Brougham).
Nobody in their right mind would have been willing to pay to restore this car, but we can hope that it provides some good parts to Jaguars that are still on the road.