suspension questions on a 70 gmc - The 1947 - Present Chevrolet & GMC Truck Message Board Network

heidick70 · 01-08-2010, 12:56 AM

whats the lowest i can drop my truck with spindals and springs in front and springs in the back where i wont have to do other mods at the time beeing? i have heard that 5inchs in the back i will need a c notch is that true?

**special-K** · 01-08-2010, 09:09 AM

4/6 drop.You will be too close for comfort in the rear w/o a c-notch.If you run empty and are careful you`ll get away with it.If you use bag in place of springs you`ll be fine.But,you have leaf springs,right?You could add auxillary bags.This not only allows the minimal clearance,it increases payload on a truck folks would figure saw it`s last loaded bed.Pretty cool.You can also tow.With 5" springs I`d think you still have to watch your payload.

heidick70 · 01-08-2010, 01:45 PM

it has coil springs in the back so i could do 5in in the back but it would be a close call? i want to go with bags some time but for now i just dont have that much cash flow comin in

01-08-2010, 12:56 AM	#1
heidick70 Registered User Join Date: Dec 2009 Location: Fort Collins Co Posts: 126	suspension questions on a 70 gmc whats the lowest i can drop my truck with spindals and springs in front and springs in the back where i wont have to do other mods at the time beeing? i have heard that 5inchs in the back i will need a c notch is that true?

01-08-2010, 09:09 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: suspension questions on a 70 gmc 4/6 drop.You will be too close for comfort in the rear w/o a c-notch.If you run empty and are careful you`ll get away with it.If you use bag in place of springs you`ll be fine.But,you have leaf springs,right?You could add auxillary bags.This not only allows the minimal clearance,it increases payload on a truck folks would figure saw it`s last loaded bed.Pretty cool.You can also tow.With 5" springs I`d think you still have to watch your payload. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

01-08-2010, 01:45 PM	#3
heidick70 Registered User Join Date: Dec 2009 Location: Fort Collins Co Posts: 126	Re: suspension questions on a 70 gmc it has coil springs in the back so i could do 5in in the back but it would be a close call? i want to go with bags some time but for now i just dont have that much cash flow comin in



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