alignment question again! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**First c10** · 05-01-2013, 01:18 PM

Hello All,
I am almost completed with rebuilding the frontend of my sons truck. with 73-87 frontend, a-arms to pitman arm. I installed disk brakes with 2-1/2" drop spindles and 1" drop springs since is is now basiclly 73-87 front components do I align to that year(1978 parts)? if so what is the best in numbers for this? my research on the forum shows
+2.0 deg +/-.25 caster
-.25 camber +/- .25
-.11 to +.03 Total Toe
with 0 thrust offset

Is this correct? can anyone help me out that has done this upgrade or change to their truck?

Thanks
Scott

BurnoutNova · 05-01-2013, 01:44 PM

Yes, since you have installed 73-up parts I'd say to tell the alignment shop to adjust it to the 78 specs. I bet the 78 specs are pretty close to your original 70 specs. Maybe the alignment specs are adjusted for radial tire technology but I'd bet that's it.

Wrenchbender Ret · 05-01-2013, 02:34 PM

My 70 is original but those specks are about what I set it at & it drives fantastic.
2 degree pos. caster. 1/8 neg camber. 1/8 in toe in.

BMERDOC · 05-01-2013, 02:56 PM

Your specs are ok. Camber should be negative and not exceed -1.0°. With your springs it will likely wind up around -.25°. Specs call for somewhere between +2 and +3 degrees. The more positive caster the better. Like Wrenchbender, 1/8" TOTAL (1/16th per side) toe-in is recommended.

05-01-2013, 01:18 PM	#1
First c10 Registered User Join Date: Dec 2012 Location: Los Banos CA Posts: 2,705	alignment question again! Hello All, I am almost completed with rebuilding the frontend of my sons truck. with 73-87 frontend, a-arms to pitman arm. I installed disk brakes with 2-1/2" drop spindles and 1" drop springs since is is now basiclly 73-87 front components do I align to that year(1978 parts)? if so what is the best in numbers for this? my research on the forum shows +2.0 deg +/-.25 caster -.25 camber +/- .25 -.11 to +.03 Total Toe with 0 thrust offset Is this correct? can anyone help me out that has done this upgrade or change to their truck? Thanks Scott __________________ 1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR SOLD GO GO!!!

05-01-2013, 01:44 PM	#2
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: alignment question again! Yes, since you have installed 73-up parts I'd say to tell the alignment shop to adjust it to the 78 specs. I bet the 78 specs are pretty close to your original 70 specs. Maybe the alignment specs are adjusted for radial tire technology but I'd bet that's it.

05-01-2013, 02:34 PM	#3
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,216	Re: alignment question again! My 70 is original but those specks are about what I set it at & it drives fantastic. 2 degree pos. caster. 1/8 neg camber. 1/8 in toe in.

05-01-2013, 02:56 PM	#4
BMERDOC Registered User Join Date: Jun 2011 Location: Richmond,Va Posts: 2,934	Re: alignment question again! Your specs are ok. Camber should be negative and not exceed -1.0°. With your springs it will likely wind up around -.25°. Specs call for somewhere between +2 and +3 degrees. The more positive caster the better. Like Wrenchbender, 1/8" TOTAL (1/16th per side) toe-in is recommended. __________________ Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever!

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