The 1947 - Present Chevrolet & GMC Truck Message Board Network - 84 3/4 truck parts that are usable for a 66?

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- - 84 3/4 truck parts that are usable for a 66? (https://67-72chevytrucks.com/vboard/showthread.php?t=370073)

CSoliz

11-02-2009 09:25 PM

84 3/4 truck parts that are usable for a 66?

My buddy has a 3/4 ton '84 at his buddys house. He told me I can go over there and take what I need from it. Now, I want to grab the lower control arms, spindles, calipers, power steering box, ps pump, ps hoses, idler arm, and the distributor. Brake booster is all ready gone

My questions to you are:

Will my list of grabs work on our trucks?

Anything else that would be a worthwhile swap for our trucks?

The truck is a 8-lug, can I buy 6-lug rotors for them and slap them on that spindle?

Am I forgetting something?

Any help and opinions are appreciated.

Thanks. :ito:

Bugeyev8

11-02-2009 10:30 PM

Re: 84 3/4 truck parts that are usable for a 66?

I am pretty sure that the 3/4 ton spindles are different, the steering box will work with an adaptor

CSoliz

11-02-2009 10:50 PM

Re: 84 3/4 truck parts that are usable for a 66?

Quote:

Originally Posted by Bugeyev8 (Post 3599724)

I am pretty sure that the 3/4 ton spindles are different, the steering box will work with an adaptor

I have heard and read that we can use 73-87 lower control arms for disc brake swaps. If we can't use the spindles, which ones would you use than?

sailed2japan

11-02-2009 11:20 PM

Re: 84 3/4 truck parts that are usable for a 66?

Quote:

Originally Posted by suicide 63

The recipe is
73-87
upper control arms any <c10-c20-c30>
lower control arms c20-c30

88-98
spindles for 1-1/4 inch rotors any exended cab will have them
rotors or a light dudy 3/4 ton they were six lug
upper and lower ball joints
outer tie rod ends
brake hoses
calipers

What makes this work is the 88 up ball joint presses into the 73 up 3/4 ton lower a-arm
Yuo will have to cut about a 1/4 inch off the new tie rod ends to get proper alignment.
Dont forget abought 88-91 square body stuff it all interchanges.
good luck

classic performance products has six lug rotors that go on 73-87 1 1/4 inch spindles about $120 for a pair.

This should help.

CSoliz

11-02-2009 11:34 PM

Re: 84 3/4 truck parts that are usable for a 66?

It does. But, I thought I have read that the upper control arms are the same from 6x or so, thru 87??????

CSoliz

11-03-2009 01:01 AM

Re: 84 3/4 truck parts that are usable for a 66?

OK, after reading a ton of threads (again), I think I have the front figured out the front disc swap for 6 lug discs. Hre is what I came up with.

66 1/2 ton UCA.
Change LCA to 3/4 ton from the 84.
Get Spindles, Calipers, Upper and Lower ball joints, Outer Tierods; 1 1/4" 6 lug rotors; all from 88 & up.

Now, what parts do i need to upgrade to the power steering from the 84?

SCOTI

11-03-2009 01:03 AM

Re: 84 3/4 truck parts that are usable for a 66?

Quote:

Originally Posted by CSoliz (Post 3599881)

It does. But, I thought I have read that the upper control arms are the same from 6x or so, thru 87??????

6X-72 have the threaded rubber-lined steel sleeve bushing. 73-87 have the press-fit rubber bushing (no steel sleeve). BJ's interchange on 6X-87 uppers so you just need the correct BJ for the spindle & it can be bolted on to any upper a-arm within those model years.

Captainfab

11-03-2009 02:07 AM

Re: 84 3/4 truck parts that are usable for a 66?

The 6 lug rotors you need are for the 7200GVW 2500 series. IIRC the '88 & '89 are one part number and the '90 + are a different number. The spindles can be the from 1500 with the 1.250 rotors or the 7200GVW 2500. You will need some different inner tierods also, the ES2020's

As for the steering box, I sell the adapter plates. See the link in my sig.

Quote:

Originally Posted by CSoliz (Post 3600039)

CSoliz

11-03-2009 09:08 PM

Re: 84 3/4 truck parts that are usable for a 66?

Quote:

Originally Posted by Captainfab (Post 3600107)

Very cool. Thank you. What exactly is GVW? I am guessing gross vehicle weight?

Quote:

Originally Posted by SCOTI (Post 3600041)

That is what I thought. Thank you for clearing that up for me.

Would it be wise just to take the whole steering assembly off the 84' or do I just need the pitman and idler arm? Or are they the same as the 66'?

Captainfab

11-04-2009 01:12 AM

Re: 84 3/4 truck parts that are usable for a 66?

Yes that is correct. The 7200GVW is the light duty 2500 series (3/4 ton) which have the 6 lug discs in a 2wd version

Quote:

Originally Posted by CSoliz (Post 3601252)

Very cool. Thank you. What exactly is GVW? I am guessing gross vehicle weight?

That is what I thought. Thank you for clearing that up for me.

I would switch over to the '84 steering linkage. It could be slightly heavier, plus that would make it a little easier to remember when the time comes that you need to replace worn parts.

Quote:

Originally Posted by CSoliz (Post 3601252)

Would it be wise just to take the whole steering assembly off the 84' or do I just need the pitman and idler arm? Or are they the same as the 66'?

Hipper

11-15-2009 11:04 PM

Re: 84 3/4 truck parts that are usable for a 66?

another option is you can remove the complete front crossmember from the frame as a complete assemby with suspension. and it will bolt right up under your pick up. then you have the complete new suspension and steering. you only have to mount the steering gear and idler arm to the frame. This is alot easier with the engine removed because the engine mounts are bolted to this crossmember also.

CSoliz

12-24-2009 04:47 PM

Re: 84 3/4 truck parts that are usable for a 66?

ok, one more question. I have 63-72 3" lowering springs for the front. If I was to swap to the 3/4 front end, would I still be able to use these springs?

Thanks.

65gmc930

12-24-2009 04:59 PM

Re: 84 3/4 truck parts that are usable for a 66?

Quote:

Originally Posted by CSoliz (Post 3691640)

ok, one more question. I have 63-72 3" lowering springs for the front. If I was to swap to the 3/4 front end, would I still be able to use these springs?

Thanks.

yes the spring pockets are all similar
(62gmc910) I didn't notice that my son was signed in

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