Replacing Drum Brakes with Discs

[peterg]

I have (refurbed) girling discs at the front and drums at the rear, new piping and a 4:1 servo, and the braking effect far exceeds the tyres (Michelin Taxi) capacity to grip!

It would be a lot cheaper to replace your brake lines first

[GREG]

Maybe best taking the car to a Jag specialist / restoration company and letting them take the lead and estimate the costs -- armed with the info from here ...

They may come up with something better than all of us !