Rotor help needed

[mtm_seven]

Hi Guys,

I recently picked up a '78 front xmember and disc brake setup. The PO had replaced all of the bushings and added 2" drop spindles.

It was a good deal but the only issue is he stayed with the 1" rotors. Meaning he purchased drop spindles for the 1" rotors.

BUT.....I want to keep my truck 6-lug

To my knowledge all of the aftermarket rotors that are drilled to 6-lug are for the 1.25 brakes.

What are my options for converting to 6-lug rotors with the 1" brakes?

I do not want to purchase all of this over again.

Ideas?

[mtm_seven]

Anyone????

[threeonthetree]

i'd call around and see if you can find someone that offers 1'' 6 lug rotors.
or go 5 lug on the rear.

[threeonthetree]

i can seem to understand what you asking. are you talking about the thickness of the rotor. or the diameter of the hole?

[mtm_seven]

To help explain please see the bold text below:

"DRUM TO DISC CONVERSIONS 67-70" created by LOLIFE99

http://67-72chevytrucks.com/vboard/s...68&postcount=4


"67-70 truck with

73-87 Crossmember Installed:
1) Your trucks 73-87 donor crossmember came from the factory with disc brakes.
* Using the 73-87 crossmember allows for upgrading to 73-87 style rubber bushed a-arms.
* Most replacement parts are more affordable than the "2-year" specific 71-72 model trucks.
* Most auto parts stores keep these parts "in stock".

2) Drop spindles are readily available,... but there are two versions that must match the two rotor versions below:

3) Rotors:
* There are two different widths of rotors available on the 73-87 model trucks.
3.1) HD or Heavy Duty rotors: (1-1/4" wide version) available from 73-87
* These will require matching HD bearings and calipers.
3.2) LD or Light Duty rotors: (1" wide version) available from 81-87.
* These will require matching LD bearings and calipers.

4) Steering linkage contains 11/16" diameter tie rods.
* Inner Tie rods are LH thread.
* Outer Tie rods are RH thread.
* Inner Tie Rods are 73-87 specific
* Outer Tie Rods are 73-87 specific

5) All 73-87 oem steering linkage will work with your 73-87 spindles.

6) The 1/2 ton a-arms have rubber bushed cross shafts
* (compared to the steel bushings of the 71-72 a-arms)

7) 73-87 crossmembers have the steel brake lines, connect the rubber brake hose, through a hole originally drilled in the 73-87 frame rail.
* Using these crossmembers in the older trucks will require you to fabricate some or all of your steel brake lines.
* (67-70 brake lines connect on the rear side of the crossmember)
* (71-72 brake lines connect on the front side of the crossmember)
* Steel reproduction brake line sets are specific to the 73-87 design with their proportioning valve mounted on a crossmember in front of the engine opposed to hanging below the master cylinder.

8) 73-87 rubber brake hoses are much longer than either the 63-70 drum brake hose or the 71-72 disc brake hose.

9) 6-lug aftermarket rotors are now readily available if you decide you want to keep your 6-lug style wheels.
* To use the 6-lug rotors you must have the 73-87 HD spindles,... since all aftermarket 6-lug rotors are only available in the 1-1/4" wide version.
* Be aware that the oem 15x6.5 steel 6-lug wheels will not clear your new disc brake conversion.
* You will need to use a set of steel wheels found on the later 73-87 4x4 trucks. "

[mtm_seven]

Well buckit. I'm just going to go 5-lug. Looking for another set of 9c1 wheels for now...