Contemporary Cobra Watts Linkage

[Dazecars]

Originally Posted by PDUB

Seems as though I read about an outboard brake conversion for the jag based on newer jag parts that were interchangeable from another newer model... I think it was from the jag lovers site, but I can't quite remember. Anyone else ever see that? What was it?

any modern Hub from the XJ40 through the X300 and X308 will work. The hibs are the same on all those cars, but the calipers and rotors for the XJ40 are designed for solid rotors similar to the ones found inboard. The X300 and X308 rotors are vented for better cooling and need a bigger caliper.

As far as other parts, if it is an XJ40 you only need the stub axle as the XJ40 and older rears use the same u-joint. If you get an X300/308 stub axle you will need the entire half shaft as the u-joints are different. Other than that the only other difference is the diamiter of the hub to wishbone pin. As was mentioned already in this thread you either need to sleeve the wishbones and use the newer pin or use different bearings and the older pin. The difference in pin size is only .05" and the newer type pin rides in a sleeve that fits in the hub bearings so a person could probably have that sleeve machined out to accept the older stile pin. The other option and the one I will be doing is I am machining som UHMW bushings to replace the bearings. they will fit in to the newer hub and accept the larger stile pin. here are some pictures I took of some XJ6 parts compared to my X308 parts

Here is the modern hub with a bolt pattern adapter



Here is the hubs side by side





here is the half shafts, old and new



new hub on an old wishbone




I have researched this a lot, please let me know if I can help further