disc brake swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bodyman9174 · 11-18-2009, 09:28 PM

Hi all Have a few questions on this 70 I bought it has drums in the front and is a 6 lug. He gave me everything for the front rotors,spindals,calbers,upper and lower A arms,the main frame cross member. and a rear end all in five lug.
Do I have to change that main cross member and the A arms? And also I don't know what year all these parts came from and he did not know to. So is there any way I can figure out what year truck these parts are from?
Thanks jay

oldblue1968chevy · 11-18-2009, 09:35 PM

mm how thick are the rotors? Will the spindles fit your balljoints?

take your spindle to the parts store and ask to see 71-72 balljoints, see if they look like the'y'll fit in your spindle..

im sure theres a better way but this is just my 2cents

**70C10Toejam** · 11-18-2009, 09:38 PM

First the simple answer, the only thing you need to change are the ball joints. BUT...they need to match the year of the disk brake spindle. You can change the A-arms if you want, there are various opinions on which are preferable. And even the cross member, but none of that is necessary.

My A-arms are the original '70 ones. What you might try is to take the disk spindle to your favorite parts store and try a 71-72 balljoint set and a 73-87 balljoint set. Someone around here might chime in on how to tell the difference.

Good luck...it's a great improvement.

bodyman9174 · 11-18-2009, 09:47 PM

ok never thought but trying the ball joints.. Just went out there the ball joints I have I know are for a 71 -72 and they seem to be to small for the lower A arm can all most tap them in. The hole is 2in wide and the rotors are 11/4in thick
thanks jay O and would I have to change the upper arm and that main center frame part

oldblue1968chevy · 11-18-2009, 10:01 PM

67-70 and 71-72 balljoints will go into all 67-72 a arms, they WONT ALL go into the spindle

If I had to do my swap again, id buy aftermarket drop spindles that fit 67-70 balljoints tierod ends, its a perfect bolt on.

But GET THE DISC BRAKE SWAP DONE BEST MOD OUT THERE!!!!!!

bodyman9174 · 11-18-2009, 10:09 PM

hmmm that ball joint I had seem like it would be to small. I have pressed other ball joints in other cars and I have never had one fit in that easy.
So the tie rods are different for 70 to 71 and 72?

yeah most def going change it all over to disc just wanna kinda get a game plan and all the right parts so I'm not sitting there all p ed off

Thanks again jay

11-18-2009, 09:28 PM	#1
bodyman9174 Registered User Join Date: Dec 2004 Location: south burbs of chicago IL Posts: 237	disc brake swap Hi all Have a few questions on this 70 I bought it has drums in the front and is a 6 lug. He gave me everything for the front rotors,spindals,calbers,upper and lower A arms,the main frame cross member. and a rear end all in five lug. Do I have to change that main cross member and the A arms? And also I don't know what year all these parts came from and he did not know to. So is there any way I can figure out what year truck these parts are from? Thanks jay __________________ Cars i have done

11-18-2009, 09:35 PM	#2
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: disc brake swap mm how thick are the rotors? Will the spindles fit your balljoints? take your spindle to the parts store and ask to see 71-72 balljoints, see if they look like the'y'll fit in your spindle.. im sure theres a better way but this is just my 2cents __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

11-18-2009, 09:38 PM	#3
70C10Toejam Hellasick Join Date: Jul 2006 Location: Death Moans, IA Posts: 876	Re: disc brake swap First the simple answer, the only thing you need to change are the ball joints. BUT...they need to match the year of the disk brake spindle. You can change the A-arms if you want, there are various opinions on which are preferable. And even the cross member, but none of that is necessary. My A-arms are the original '70 ones. What you might try is to take the disk spindle to your favorite parts store and try a 71-72 balljoint set and a 73-87 balljoint set. Someone around here might chime in on how to tell the difference. Good luck...it's a great improvement. __________________ I keep two MAGNUMS in my desk. One's a gun, and I keep it loaded. The other's a bottle and it keeps ME loaded. I'm Tracer Bullet. (Calvin and Hobbes) This life was a test. It was only a test. If this had been an actual life, you would have received instructions on where to go and what to do. RED meat is not bad for you...FUZZY BLUE/GREEN MEAT is bad for you!!!!!!!!!!!!! BUILT FORD TOUGH WITH CHEVY STUFF--sticker at Goodguys

11-18-2009, 09:47 PM	#4
bodyman9174 Registered User Join Date: Dec 2004 Location: south burbs of chicago IL Posts: 237	Re: disc brake swap ok never thought but trying the ball joints.. Just went out there the ball joints I have I know are for a 71 -72 and they seem to be to small for the lower A arm can all most tap them in. The hole is 2in wide and the rotors are 11/4in thick thanks jay O and would I have to change the upper arm and that main center frame part __________________ Cars i have done Last edited by bodyman9174; 11-18-2009 at 09:49 PM.

11-18-2009, 10:01 PM	#5
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: disc brake swap 67-70 and 71-72 balljoints will go into all 67-72 a arms, they WONT ALL go into the spindle If I had to do my swap again, id buy aftermarket drop spindles that fit 67-70 balljoints tierod ends, its a perfect bolt on. But GET THE DISC BRAKE SWAP DONE BEST MOD OUT THERE!!!!!! __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

11-18-2009, 10:09 PM	#6
bodyman9174 Registered User Join Date: Dec 2004 Location: south burbs of chicago IL Posts: 237	Re: disc brake swap hmmm that ball joint I had seem like it would be to small. I have pressed other ball joints in other cars and I have never had one fit in that easy. So the tie rods are different for 70 to 71 and 72? yeah most def going change it all over to disc just wanna kinda get a game plan and all the right parts so I'm not sitting there all p ed off Thanks again jay __________________ Cars i have done



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