narrowing rear end without rotors

[01somta]

I just got my wheels in so I am now ready to have my rear end narrowed, powdercoated, and built. However, I do not have my brakes yet. Will the guy narrowing the rear end be able to get precise measures without having my rotors. It seems like the thickness of the rotors would cause the wheels to stick out further. The guy is insisting on not needing the rear rotors. This is the first rear end that I have ever had narrowed so this may be a stupid question.

[KMD]

Yes you will have to take in consideration the rotor flange thickness. But more than that, if you are going to run rear disc brakes you need to make sure you have enough clearance for the rotor offset, caliber, and e-brake. Make sure to check and double check these things for clearance.
Don't ask me how I know, but when you think you have everything measured perfect, you order your new narrowed Moser rear end, go to install it in your car and the e-brake bracket hits the side of the frame you will find you will not be a happy camper...
:pat:

[68firehawk]

Yes you will have to take in consideration the rotor flange thickness. But more than that, if you are going to run rear disc brakes you need to make sure you have enough clearance for the rotor offset, caliber, and e-brake. Make sure to check and double check these things for clearance.
Don't ask me how I know, but when you think you have everything measured perfect, you order your new narrowed Moser rear end, go to install it in your car and the e-brake bracket hits the side of the frame you will find you will not be a happy camper...
:pat:

Yes this is very important.
Most aftermarket brake manufactures can send you a template to make sure your calipers will clear your rear rim. It would be ideal if you had the rotors and calipers to verify. It would be a nightmare if you had to add spacers to your rims after narrowing your axle. My guess is the guy narrowing your axle is making an assumption on caliper thickness. Either that or you’re running full floating hubs. I know mine bolt to the back of the hub so rotor thickness wasn’t an issue.

[MrQuick]

If he is experienced with this he should know what he has to factor in. I wouldn't worry about it.