drw to srw conversion question

let's start front the beginning (89 crew cab dually):

took out the drw and installed a c&c. mounted my rig wheels on and now they are too far in. after doing some research i found out you could use 3/4 ton srw and switch brakes, hub, etc. so that being said i picked one up yesterday and it is half way done thru a disc conversion. all i need is calipers and brackets to complete that. since its gonna be disc now there wouldn't be a reason to change out hubs right? other than probably just the studs to be longer to bolt up adapters to it. any input appreciated and if you can guide me to the right bracets and calipers that would be great.

OK, first off... (please don't take this as gospel, just as a starting point) From what I've gathered the major differences in the c&c, srw and drw axles are this.

Both complete axle assemblies have a short side and a long side on axle lengths. But there are two overall axle length differences. The srw and c&c axle lengths are the same, and the drw is different.

The srw axle tube o.d. is 3.3/8" where as the c&c and drw axle tube have a 3.1/2" o.d.

The c&c and drw hubs are the same and the srw hub is different, but they all should be interchangeable. The axle spindle will accept both hubs. But when using the c&c or drw hub assembly on a srw housing the brake mounting flange will not line up (and vise-versa).

The overall axle length of a c&c is 63 1/2", srw is 67 1/2" and the drw is 72".

So to try and answer your ??? here goes. You're wanting to use the srw hubs on your c&c housing. The srw hubs "should" push out the track width 4" overall but the brake flange will need to be cut off and ground down and you will need to use a weld on brake caliper bracket.

These brackets can be bought on many 4x4 parts websites and even E-Bay. Just make sure you get the appropriate ones to match your housing diameter.

Now on to the calipers. The '73-87 Chevy 3/4 Ton 4x4 front calipers are standard and the '88-on are metric. So, again use the ones matching the existing brake system for ease of installation.

The '73-87 Chevy 3/4 Ton 4x4 front rotors will work with both calipers and are the same diameter as the front rotors on your dually (12.5")

And the studs... if you are using the adapter that used a counter sunk lug nut you "may" be able to get away with the stock studs. But if you try this and they don't give you the warm and fuzzy's about how safe it will be. You can and should replace them with the stud from the same year drw/c&c hub. (Easy way to check this is if the stock stud is a metric or standard stud/nut)

These are just some of the websites where you can find the caliper brackets
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I hope this helps a little. Darrell

well since the srw I bought have the rotors already on there and they measure 67 inches from wms to wms I think im just going to get the bolt on brackets for an avg. cost of 50 bucks and then the 3/4 ton front calipers to finish off my disc conversion. I really didnt plan on a disc conversion but I think it will make things easier since I wont have to do any swapping of anything. I have four rig wheels on the back so with the extra 4 inches i get from the srw that will push my wheels out just even with the fenders as appose to how they are now with the c&c.

oh one thing I did forget to ask is for guidance on the brakes. Would I have to get a different prop. valve with rear disc? I have hydroboost brakes in it too if that makes a difference.