Just for the sake of comparison, take a look at this thread, it shows how Zman installed Jaguar suspension front & rear in his '57 Buick: http://www.jalopyjournal.com/forum/showthread.php?t=24785&&showall=1 The rear is trickier, but the front is surprisingly straightforward. Just some food for thought.
IN regards to swapping the older Huck brakes for newer Bendix brakes on these cars, here's some info @ ChevyTalk. There's more out there, I'm just not finding it right now. I have no personal experience w/ the 49-50 Huck brakes, but I've heard lotsa people complain about them. When I first put my car on the road, I used the original (Bendix) drum brakes on the front of my 52. I did change over to a dual master cylinder, but I was very pleased with the way the car stopped.. even in panic mode. A lot of the dudes that "restore" these cars will sneak the 52-54 brakes onto the 49-50 cars (as well as converting to 12V) so they can actually drive when there are other cars on the road.
Thanks to everybody for all the help... I think you talked me out of it tho. The rebuild kit and a brand new grease gun to slap in the trunk might have to do for now. Lucky PS... anybody got a chrome grease gun they'd want to trade for a camero clip? mebbe one thats suede with a few pinstripes on it?
Up front, you need a donor for backing plates, it's a bolt on conversion. Out back, you need to change the rearend housing because the backing plates for the Bendix brakes do not fit the 49-50 rear - the rivets are in different places. A guy on Chevytalk warned me about that because he learned the hard way. If you're not using the stock rear, then it doesn't matter. I'm not going to mess with mine unless it needs rebuilding, and since I'm running the 6 I pretty much have to keep the stock stuff as opposed to going with a Mustang 2 setup. The only thing I am tempted to change is to go to a dual master and maybe put it on the firewall for ease in access. But here again I drove a much more powerful all-drum car for a long time. You just need to get used to how it stops and adjust your braking habits accordingly. And don't tailgate anyone with it - You can get a disc brake conversion for the stock front end for around $200 for the brackets, too, that might be something to consider.
That's what I was thinking too, get a jag frontend, according to information i've gathered, the XJ6 1969-73 frontend is 59" wide, and the rear is 60.25", while the XJ6 Series II 74-82 front is 60.2" and the rear is 60.8". I'm betting the stock frontend is around 58" wide, while camaro clips are 61-62" (not positive about that though).