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

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

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.

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.

**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.

**Classic Heartbeat** · 01-03-2014, 01:45 PM

I stand corrected. I have gone threw this many times and I am not sure why 1 1/2" sticks in my head..

WES

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 Senior Member Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,206	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: 10,770	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: 10,770	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	#10
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

01-03-2014, 01:45 PM	#15
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,770	Re: Belltech 3120 drop spindle fit my truck?!?! Have 30 minutes to decide. I stand corrected. I have gone threw this many times and I am not sure why 1 1/2" sticks in my head.. 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



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.