How much can I grind off? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cochino12 · 01-05-2010, 06:13 PM

How much can I gring off my lca to help clear my 8" rally wheels? If anyone can take a picture of how much they took off it would help me a ton, thanks

related post
http://67-72chevytrucks.com/vboard/s...d.php?t=379588

grinch4om · 01-05-2010, 06:32 PM

I wouldn't...I would find 7" van ralleys, put the same trim ring and center on that wheel and be done...that's what I did and you have to really look to notice

SCOTI · 01-05-2010, 08:10 PM

IIRC, the 8" wheels have 4" back-spacing & the 7" wheels are like 3.75". So there's not much difference toward the a-arm.

OJOE · 01-05-2010, 08:21 PM

Quote:

Originally Posted by SCOTI

IIRC, the 8" wheels have 4" back-spacing & the 7" wheels are like 3.75". So there's not much difference toward the a-arm.

and that 1/4 " diffrence is what you need. good luck, joe

**texassquarebodies** · 01-05-2010, 08:23 PM

I cut off about 4 " inches of the lip off. Front and rear on the lower A arm. I cut it smooth and blended the sharp edges. Been like that for years. Did it to my dad's truck also. No problems. Might need to grind the ball joint area as well for 8" rallys. Also, 8" rally's should have 4.5" B.S and 7" have 3.75". I have 7" truck rallies on my burb with dropped spindles. No cutting at all. Plenty of clearance.

cochino12 · 01-05-2010, 08:29 PM

Quote:

Originally Posted by texassquarebodies

I cut off about 4 " inches of the lip off. Front and rear on the lower A arm. I cut it smooth and blended the sharp edges. Been like that for years. Did it to my dad's truck also. No problems. Might need to grind the ball joint area as well for 8" rallys. Also, 8" rally's should have 4.5" B.S and 7" have 3.75". I have 7" truck rallies on my burb with dropped spindles. No cutting at all. Plenty of clearance.

any pictures? I'm not sure how deep into the lip I can go. thanks for the info

1LowToy · 01-05-2010, 08:43 PM

My guess is I'm going to be having the same problem when I do mine. Is it the 275/60 tire rubbing, rim or both?

**lolife99** · 01-05-2010, 08:58 PM

Here's the only picture I have.
The blue tape shows the area that is already trimmed.
(blue line shows how I cut up the bumpstop area)

I agree,... find some 7" ralleys to help the wheels clear the a-arm and the outer edge of the wheelwell opening.
But I always trim them anyway,... in case you want or have to throw an 8" ralley wheel on there.

**lolife99** · 01-05-2010, 09:03 PM

Quote:

Originally Posted by 1LowToy

My guess is I'm going to be having the same problem when I do mine. Is it the 275/60 tire rubbing, rim or both?

A 15" rim with 4 inch backspace (like a 15x8 truck ralley) is the problem.
Any 15" rim with 3.5" backspace will be fine.
Nothing that a grinder can't easily fix.

cochino12 · 01-05-2010, 11:53 PM

Quote:

Originally Posted by lolife99

Here's the only picture I have.
The blue tape shows the area that is already trimmed.
(blue line shows how I cut up the bumpstop area)

I agree,... find some 7" ralleys to help the wheels clear the a-arm and the outer edge of the wheelwell opening.
But I always trim them anyway,... in case you want or have to throw an 8" ralley wheel on there.

Keith you are the man!! Looks like I still have more to trim, I really dont want to use the van wheels unless I have to. Thanks

**lolife99** · 01-06-2010, 12:10 AM

Hey Adam,...
If you have a bare 8" ralley,... bolt it up after you trim the a-arm, (with the weight of the truck on it), and rotate the rim with the wheel turned full lock left and right.
Also look for wheel weight interference after you get your tires installed.

I still like 7's up front since the track width of these trucks are wider in front.

1LowToy · 01-06-2010, 12:24 AM

Quote:

Originally Posted by lolife99

Here's the only picture I have.
The blue tape shows the area that is already trimmed.
(blue line shows how I cut up the bumpstop area)

I agree,... find some 7" ralleys to help the wheels clear the a-arm and the outer edge of the wheelwell opening.
But I always trim them anyway,... in case you want or have to throw an 8" ralley wheel on there.

Are you saying to cut away all that blue taped area aroung the ball joint?

bigblock73 · 01-06-2010, 12:25 AM

Quote:

Originally Posted by 1LowToy

Are you saying to cut away all that blue taped area aroung the ball joint?

No, he is saying that is the area that was cut...you can see how the arm steps up in that area...that is the trimmed off area.

cochino12 · 01-06-2010, 12:25 AM

Quote:

Originally Posted by 1LowToy

Are you saying to cut away all that blue taped area aroung the ball joint?

I dont think so, if you look at the lip you can tell that the part that is taped has been trimmed. Did I describe that right?

EDIT: Jeff beat me to it

**lolife99** · 01-06-2010, 12:34 AM

I just put the blue tape on there to show the area that was trimmed.
(since I didn't have a picture of a stock a-arm to compare it to).

1LowToy · 01-06-2010, 12:40 AM

Quote:

Originally Posted by cochino12

I dont think so, if you look at the lip you can tell that the part that is taped has been trimmed. Did I describe that right?

EDIT: Jeff beat me to it

Like from the inside edge of the ball joint out? On the side of the LC of course

**lolife99** · 01-06-2010, 12:48 AM

Quote:

Originally Posted by 1LowToy

Like from the inside edge of the ball joint out? On the side of the LC of course

yes.

**lolife99** · 01-06-2010, 12:54 AM

In this picture,... it's the red lines that are the area of concern.

I also trim up the bumpstop bracket,... but that's up to you.

mailman · 01-06-2010, 01:07 AM

Quote:

Originally Posted by lolife99

in this picture,... It's the red lines that are the area of concern.

I also trim up the bumpstop bracket,... But that's up to you.

i had to remove my bumpstop bracket for a lower bag plate mount.will this hurt any thing?

low86c10 · 01-07-2010, 08:46 PM

6.5" van rallies work

01-05-2010, 06:13 PM	#1
cochino12 It followed me home? Join Date: Mar 2003 Location: Yup Posts: 5,751	How much can I grind off? How much can I gring off my lca to help clear my 8" rally wheels? If anyone can take a picture of how much they took off it would help me a ton, thanks related post http://67-72chevytrucks.com/vboard/s...d.php?t=379588 __________________ Adam That's why they call it a shortcut Kyle, if it was easy it would just be the way. 86 c-10 SWB 85 CCSB 90 GMC K30 Crew SRW 1985 C30 Dually

01-05-2010, 06:32 PM	#2
grinch4om dang its hot Join Date: Nov 2006 Location: frankfort kentucky Posts: 1,349	Re: How much can I grind off? I wouldn't...I would find 7" van ralleys, put the same trim ring and center on that wheel and be done...that's what I did and you have to really look to notice Attached Images Last edited by grinch4om; 01-05-2010 at 06:33 PM.

01-05-2010, 08:10 PM	#3
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: How much can I grind off? IIRC, the 8" wheels have 4" back-spacing & the 7" wheels are like 3.75". So there's not much difference toward the a-arm. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

01-05-2010, 08:23 PM	#5
texassquarebodies Truck Nut Join Date: Jun 2007 Location: Wills Point, Texas Posts: 407	Re: How much can I grind off? I cut off about 4 " inches of the lip off. Front and rear on the lower A arm. I cut it smooth and blended the sharp edges. Been like that for years. Did it to my dad's truck also. No problems. Might need to grind the ball joint area as well for 8" rallys. Also, 8" rally's should have 4.5" B.S and 7" have 3.75". I have 7" truck rallies on my burb with dropped spindles. No cutting at all. Plenty of clearance. __________________ Tony Kee Texas Square Bodies Last edited by texassquarebodies; 01-05-2010 at 08:24 PM. Reason: spelling

01-05-2010, 08:43 PM	#7
1LowToy Registered User Join Date: Nov 2009 Location: Sonora California Posts: 860	Re: How much can I grind off? My guess is I'm going to be having the same problem when I do mine. Is it the 275/60 tire rubbing, rim or both? Last edited by 1LowToy; 01-05-2010 at 08:44 PM.

01-05-2010, 08:58 PM	#8
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: How much can I grind off? Here's the only picture I have. The blue tape shows the area that is already trimmed. (blue line shows how I cut up the bumpstop area) I agree,... find some 7" ralleys to help the wheels clear the a-arm and the outer edge of the wheelwell opening. But I always trim them anyway,... in case you want or have to throw an 8" ralley wheel on there. Attached Images

01-06-2010, 12:10 AM	#11
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: How much can I grind off? Hey Adam,... If you have a bare 8" ralley,... bolt it up after you trim the a-arm, (with the weight of the truck on it), and rotate the rim with the wheel turned full lock left and right. Also look for wheel weight interference after you get your tires installed. I still like 7's up front since the track width of these trucks are wider in front. Last edited by lolife99; 01-06-2010 at 12:12 AM.

01-06-2010, 12:34 AM	#15
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: How much can I grind off? I just put the blue tape on there to show the area that was trimmed. (since I didn't have a picture of a stock a-arm to compare it to).

01-06-2010, 12:54 AM	#18
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: How much can I grind off? In this picture,... it's the red lines that are the area of concern. I also trim up the bumpstop bracket,... but that's up to you. Attached Images

01-07-2010, 08:46 PM	#20
low86c10 Registered User Join Date: Jul 2009 Location: louisville, Ky Posts: 105	Re: How much can I grind off? 6.5" van rallies work

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