Right chaps, a question. There's obviously no shortage of headlight conversion kits out there for our 4 eyed beasties, what with every British car for 20 years having either 7 or 5/3/4 inch headlights, but there is a huge variation in price... I'm not after anything fancy, just an upgrade from the sealed beams to halogen bulbs would be nice - has anybody got any recommendations or had any bad experiences? I don't want to have to adapt anything if I can help it - as I believe that any upgrade should be removable where possible - and I'm already in the propcess of fitting relays to take the pressure off the ancient wiring, but the kits I have found seem to range from £30 to £200 a pair! And it's amazing how much cheaper the same lights get if you say they are for a triumph instead of a Jag... Has anybody dabbled in this area and found a winner?

Hi Brian

Thanks for the tip - it was the huge variation in prices that confused me initially, but I think those 7" / 5.75" units are so common you don't necessarily have to pay the premium for having 'Jaguar' on the box! There's a good selection on SVC and Holden I have found, so I will have a go and let everyone know how it get on...

Thanks for the info, as well as your website tips.  I just found it the other day, and printed them all out -- stored in my "yet to be done" file (or should I say "box")(actually, more the size of a "crate", and growing). 

Well, we've got two 420Gs -- one with the 502ci Cadillac engine with all Delco accessories and Turbo400 auto trans, and one original 420G (except it has an Mk10 grill, and I have been adding on an AC system with 140amp one-wire alternator -- for the past year).  Attached pics were taken about 4 years ago -- not much changed; maybe 2000 more miles, or less.  It turns out that I can only post one pic at a time; here's the 502 engine.

XJS steering rack and brakes front and rear and wire wheels, all stock inside and exterior, except for that (and ride height).  The other 420G keeps its original mechanicals (both black).