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Old 05-01-2010, 05:01 PM   #1
blazntn
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Drilling Rotors?

What is involved? I am planning on trading for a set of 5x5 rotors and spindles. But, I am wanting to change it to 5x4.75 to match my vette rearend.
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Old 05-01-2010, 06:17 PM   #2
lolife99
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Re: Drilling Rotors?

www.PerformanceOnLine.com sells a truck rotor that has the 5x4.75 pattern already.
These will work as long as your spindles will work with a 1.25" wide rotors.
(not the 1" wide rotors).
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Last edited by lolife99; 05-01-2010 at 06:17 PM.
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Old 05-01-2010, 07:51 PM   #3
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Re: Drilling Rotors?

ya but cant I just have the rotors I have drilled out to that pattern?
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Old 05-01-2010, 08:07 PM   #4
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Re: Drilling Rotors?

sure.
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Old 05-01-2010, 08:12 PM   #5
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Re: Drilling Rotors?

Do you just lay out the pattern and drill it? How do you put the studs in?

Sorry I have never fooled with the brakes much!!!

I plan on having a friend of my dad's do it for me. He works in a CAT machine shop.
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Old 05-01-2010, 11:59 PM   #6
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Re: Drilling Rotors?

drilled mine its easy works great< 1/4 holes and countersink bot for bevel>>>
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Old 05-02-2010, 06:06 AM   #7
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Re: Drilling Rotors?

Those holes promote cracks as does a chamfer. It's best to radius the holes to eliminate sharp edges, as opposed to a chamfer. Will also eat pads more quickly.
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Old 05-02-2010, 07:05 AM   #8
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Re: Drilling Rotors?

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Originally Posted by project67-stepside View Post
drilled mine its easy works great< 1/4 holes and countersink bot for bevel>>>

Quote:
Originally Posted by mclairmo View Post
Those holes promote cracks as does a chamfer. It's best to radius the holes to eliminate sharp edges, as opposed to a chamfer. Will also eat pads more quickly.
He is talking about changing the bolt pattern of the lug studs, not drilling the disc surface.
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Old 05-02-2010, 08:47 AM   #9
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Re: Drilling Rotors?

BB 72 Impala brakes go right on the truck spindles and are 4.75 pattern. Crossdrilling works fine if you dont drill thru the venting..... Never had a pair crack and I have done dozens of sets.
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Old 05-02-2010, 04:33 PM   #10
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Re: Drilling Rotors?

what do those impala brakes run at the local parts store? that might be the best way to go!
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Old 05-02-2010, 05:08 PM   #11
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Re: Drilling Rotors?

Advanced Auto Parts charged me 100.00 out the door for rotors, calipers, pads, bearings, and dust caps. 72 to 73 will work for sure. Take your wheel bearings down to the parts house and test fit to the races. This is a VERY cheap upgrade for the 67 to 70 trucks and the rotors are 12.25 diameter.
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Old 05-03-2010, 09:33 PM   #12
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Re: Drilling Rotors?

Will 1980's models C-10 spindles work on my 69 arms? what do I need to make them work? Might trade my 6 lugs for a guys 5 lug off of an 84!
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Old 05-03-2010, 10:59 PM   #13
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Re: Drilling Rotors?

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Originally Posted by blazntn View Post
Will 1980's models C-10 spindles work on my 69 arms? what do I need to make them work? Might trade my 6 lugs for a guys 5 lug off of an 84!
You will have to change the upper and lower ball joints, and outer tie rod ends.
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Old 05-03-2010, 11:01 PM   #14
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Re: Drilling Rotors?

As long as your '69 is a C10, just change the balljoints and everything else will bolt up. Does your '69 already have power steering?

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Will 1980's models C-10 spindles work on my 69 arms? what do I need to make them work? Might trade my 6 lugs for a guys 5 lug off of an 84!
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Old 05-04-2010, 02:43 PM   #15
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Re: Drilling Rotors?

It is a c-10. SO I will just need the newer ball joints. I have a dropmember so the tierods wont be an issue.
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