Quote:
Originally Posted by vics stuff
Replacing the rotors with new ones is not going to solve your problem. What I would do is take your rotors to a machine shop and have them turn the rotors and remove just a slight bit off the inner part of the rotor where it hits the lower control arm.
Vic
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Not necessary if you read the two links I posted above. This isn't some new rare thing that just happened to him with the rotors he has, it was a very common deal when guys were all using the oem MII control arms before tube A arms started showing up. You reworked the control arms a bit for clearance and were all good and away you went. No looking for the "right rotors" no dinging around with other mods.
At first look it looked like who ever had machined the rotors originally had left a ridge on the inside of the surface. A ridge that would be beyond the area the pad contacted. That may be because of the groove the a arm cut in it. I'm thinking that that is still in an area that the pads don't touch.
Still it is a five minute job to do exactly what they said to do in the Welders series link and be done with it. That is what everyone has done in the past.
rand: Welder Series
Thickness: 3/8"
Brake kit for 1974 -78 Mustang II and 1974 – 80 Pinto/Bobcat spindles. This kit adapts larger 11″ Granada rotors and 1982 – 92 Camaro (or equivalent) calipers for a simple, effective, and inexpensive brake upgrade. Some 14″ wheels will clear the calipers. 15″ wheels will clear. The 1975 – 80 Granada rotors move each wheel out 1/4″ from stock Mustang II rotors.
The stock Mustang II dust shield must be removed from the spindle and discarded. The Granada rotors fit onto the Mustang II spindles using stock Granada bearings, seals, outer washers, nuts and dust covers. Stock Mustang II spindle nuts can be used.
The end of the lower control arm must be ground away for rotor clearance. DO NOT INSTALL THE ROTOR UNTIL THIS CLEARANCE HAS BEEN ESTABLISHED. 1/8 inch clearance is enough.
Use stock brake pads (#7070A or FMS #D154) for the calipers.
NOTE: The squealer tab on the inside brake pad must be bent 1/8” toward the rotor surface. This can be done by carefully tapping it with a hammer. The outer pad tabs may need to be bent slightly to tighten the pad on the caliper. This will keep the pads from squeaking.
Stock GM calipers have a lip around the brake hose port. Grind this lip and rotate the hose fitting so it clears the coil spring when the steering is at full turn lock. Be sure the brake flex hoses do not touch wheels, tires or any other parts under any suspension travel or cornering conditions.
Be sure to read the installation tip sheets shipped with each kit.