Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**GAc10boy** · 12-31-2013, 02:47 PM

Amazon has Belltech's 3120 3" drop spindle for a really good price and I had some Amazon credit so I hastily pulled the trigger. They are for the 1.25" rotor which I'm not exactly sure if I have.

Can anyone tell me what likely came on a base model 4.1L/250 6 cylinder 1/2 ton truck in 1971? I know that's a long shot but I have 30 minutes to cancel order.

CC69Rat · 12-31-2013, 03:04 PM

I'm thinking you should be good. looks like 71-72 fit, no problemo. I'd do new upper and lower balljoints, new tire rod ends too while you have it apart.

http://www.summitracing.com/parts/bel-3120/applications

**GAc10boy** · 12-31-2013, 03:06 PM

Quote:

Originally Posted by CC69Rat

I'm thinking you should be good. looks like 71-72 fit, no problemo. I'd do new upper and lower balljoints, new tire rod ends too while you have it apart.

http://www.summitracing.com/parts/bel-3120/applications

Thanks, Chad. I think they will, too. I just freaked a little bc I haven't measured my rotor. Plan to rebuild the whole front end while I'm in there. Thanks!

**Classic Heartbeat** · 12-31-2013, 04:34 PM

You have 1 1/2" spindles. 1 1/4" is for 73-87 light duty. WES

**Classic Heartbeat** · 12-31-2013, 04:36 PM

Probably why they were on sale. Not a lot of light duty trucks around. WES

mgchevyparts · 12-31-2013, 09:39 PM

Quote:

Originally Posted by Classic Heartbeat

You have 1 1/2" spindles. 1 1/4" is for 73-87 light duty. WES

WTF?

ALL 71-72 1/2 ton trucks use the same 1.25" thick rotor

Tx Firefighter · 12-31-2013, 10:18 PM

Quote:

Originally Posted by mgchevyparts

WTF?

ALL 71-72 1/2 ton trucks use the same 1.25" thick rotor

This is the correct answer.

**lolife99** · 12-31-2013, 10:29 PM

Quote:

Originally Posted by Classic Heartbeat

You have 1 1/2" spindles. 1 1/4" is for 73-87 light duty. WES

Wes,...
Belltech #3120 is a "71-72 only" HD spindle (1-1/4" rotor width)
Belltech #3100 is the 73-87 HD spindle.
Belltech #3200 is the light duty 1" rotor spindle for 73-87 applications.
(actually it's more like 81-87)

There is no 1-1/2" wide rotor.

**GAc10boy** · 01-01-2014, 09:20 PM

Quote:

Originally Posted by lolife99

Wes,...
Belltech #3120 is a "71-72 only" HD spindle (1-1/4" rotor width)
Belltech #3100 is the 73-87 HD spindle.
Belltech #3200 is the light duty 1" rotor spindle for 73-87 applications.
(actually it's more like 81-87)

There is no 1-1/2" wide rotor.

Good info here.

mgchevyparts · 12-31-2013, 09:41 PM

Quote:

Originally Posted by GAc10boy

Amazon has Belltech's 3120 3" drop spindle for a really good price and I had some Amazon credit so I hastily pulled the trigger. They are for the 1.25" rotor which I'm not exactly sure if I have.

Can anyone tell me what likely came on a base model 4.1L/250 6 cylinder 1/2 ton truck in 1971? I know that's a long shot but I have 30 minutes to cancel order.

You bought the correct spindle

BigRed76 · 12-31-2013, 10:44 PM

I would imagine you'd have to also run some larger wheels with 3" drop spindles since I've heard of people having clearing issues with 2.5" drop spindles & 15" wheels...

**lolife99** · 12-31-2013, 11:33 PM

Quote:

Originally Posted by BigRed76

I would imagine you'd have to also run some larger wheels with 3" drop spindles since I've heard of people having clearing issues with 2.5" drop spindles & 15" wheels...

Not really.
I've been using Belltech 3" drop spindles with 15" wheels for over 25 years.
I just trim the lower a-arm, just like I do with 2.5" drop spindles,...
and use a 15" wheel with no more than a 4" backspace.

BigRed76 · 01-01-2014, 01:00 AM

Quote:

Originally Posted by lolife99

Not really.
I've been using Belltech 3" drop spindles with 15" wheels for over 25 years.
I just trim the lower a-arm, just like I do with 2.5" drop spindles,...
and use a 15" wheel with no more than a 4" backspace.

Good to know. This is the first I've heard of 3" spindles.

**GAc10boy** · 01-01-2014, 09:20 PM

Quote:

Originally Posted by BigRed76

I would imagine you'd have to also run some larger wheels with 3" drop spindles since I've heard of people having clearing issues with 2.5" drop spindles & 15" wheels...

I'll be running 20s up front.

12-31-2013, 02:47 PM	#1
GAc10boy Senior Member Join Date: Oct 2013 Location: Marietta, GA Posts: 1,642	Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. Amazon has Belltech's 3120 3" drop spindle for a really good price and I had some Amazon credit so I hastily pulled the trigger. They are for the 1.25" rotor which I'm not exactly sure if I have. Can anyone tell me what likely came on a base model 4.1L/250 6 cylinder 1/2 ton truck in 1971? I know that's a long shot but I have 30 minutes to cancel order. __________________ - Robbie UNITED BY TRUCKS - classic truck video content YouTube: www.youtube.com/c/unitedbytrucks Instagram: @united_by_trucks Paw Paw '68 508 Dark Blue Custom C10 Teddy '68 GMC SWB 503 Light Green LS Build Mississippi Mud '75 Skyline Blue Patina SBC Build

12-31-2013, 03:04 PM	#2
CC69Rat Registered User Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,212	Re: Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. I'm thinking you should be good. looks like 71-72 fit, no problemo. I'd do new upper and lower balljoints, new tire rod ends too while you have it apart. http://www.summitracing.com/parts/bel-3120/applications __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

12-31-2013, 04:34 PM	#4
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Re: Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. You have 1 1/2" spindles. 1 1/4" is for 73-87 light duty. WES __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

12-31-2013, 04:36 PM	#5
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Re: Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. Probably why they were on sale. Not a lot of light duty trucks around. WES __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

12-31-2013, 10:44 PM	#11
BigRed76 Registered User Join Date: Jan 2010 Location: Loveland, CO Posts: 1,921	Re: Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. I would imagine you'd have to also run some larger wheels with 3" drop spindles since I've heard of people having clearing issues with 2.5" drop spindles & 15" wheels... __________________ Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB



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