'72 Satellit Sebring Plus brake question(s)

[Dibbons]

I need front wheel bearing seals and Autozone has two different seals that "fit", which one is correct for my disc brake optioned vehicle: 6840S or 8121S? Thank you. \

One more question, the Factory Service manual has two sections for disc brakes, one for "fixed" calipers and another for "floating" calipers, which type would my '72 SSP project car have? Thanks again.

 

[72RoadrunnerGTX]

8121S, & floating single piston calipers

 

[Dibbons]

Now at the alignment shop and we pulled the front wheel bearing and seals. The 8121S seals I brought with me do not look the same as the seals installed on the car. The 8121S seals have a step, in other words two different diameters, the installed seals are just ordinary/normal looking seals without any step. Here is a generic foto of what the installed seal looks like.



The 8121S has the step, I think you can just barely make it out in this internet foto of the same part number 8121S:

 

[72RoadrunnerGTX]

added boot, not part of the seal surface, updated. If the seal fits the spindle shoulder, use it.

 

[Dibbons]

The shop did not feel comfortable with the different looking 8121S seal, so they matched the old seal and installed a 6840S Federal Mogul/National Seal instead. On the E-bay lookup chart, it is listed as fitting 10 inch brakes. Old seals were: Victor #49746

http://www.ebay.com/itm/Wheel-Seal-Front-Inner-NATIONAL-6840S-/351808965783

http://www.ebay.com/itm/1955-1962-C...ash=item56919eb872:g:FGsAAOSwcUBYSuzw&vxp=mtr