What drop springs do i need - The 1947 - Present Chevrolet & GMC Truck Message Board Network

5.3c10 · 04-19-2014, 08:42 PM

I have a 68 stepside that came with a straight six/3speed. I am converting it to a suburban gas tank and installing a 5.3/6L80 combo. What size drop springs, if any, would i need to achieve a -3 rear/-1 front drop from stock ride height?

67ctener · 04-19-2014, 09:48 PM

You pretty much answered your own question. I don't know if they make a 1" front drop spring but they may. If your worried about the weight factor and how much it affects it just measure before engine swap and adjust from there. The rear tank shouldn't affect the drop enough to notice so you would be fine with a 3" drop spring, again if they make it. More common 2/4 3/5 and 4/6 I know they make those springs/spindles. Good luck

BMERDOC · 04-19-2014, 09:54 PM

Just remember your original springs have sagged over the years. If you think you want a 1" drop you may nee a 2". 1, 2 and 3" drop springs are readily available.

Mr Handy · 04-19-2014, 09:57 PM

You can go with a 1" spring up front for a small block truck, in the back I would think it would depend on if you have a short or long bed. I was shooting for 5" drop in the back if my long bed truck and went with a 4" spring.

I would recommend calling ECE and taking with them, they are the best in my experience.

5.3c10 · 04-21-2014, 07:25 AM

Thanks for the responses. I am going to order the 2/4 springs. Would I need to install c-notches for a 4" drop in the rear? Lastly does CPP make quality parts? They offer springs and shocks for 300.

**lolife99** · 04-21-2014, 07:43 AM

Quote:

Originally Posted by 5.3c10

Thanks for the responses. I am going to order the 2/4 springs. Would I need to install c-notches for a 4" drop in the rear? Lastly does CPP make quality parts? They offer springs and shocks for 300.

Personally I would use ECE.
Look here:
www.earlyclassic.com.

Also check out the "Vendor Review" area of the board for CPP issues.

smoked68 · 04-21-2014, 11:09 AM

4/7 drops is what I have, no c-notch. I went with the or re-went with drop spindals in front. Rode like a wagon with drop srings. Now smooth

Mr Handy · 04-21-2014, 01:05 PM

I went with a 5" drop in the back(4"spring on my long bed).
I was able to haul a good 500lb of tools and BBQ grill with it a couple weekends ago with absolutely no problem and no c notch.

5.3c10 · 04-21-2014, 03:53 PM

Thank you for the clarification and thanks for the link lolife99.
Would 274/40r20 on 20x10 with a -25 offset be too big for a 2/4 drop?

04-19-2014, 08:42 PM	#1
5.3c10 Registered User Join Date: Mar 2014 Location: Savannah, GA Posts: 6	What drop springs do i need I have a 68 stepside that came with a straight six/3speed. I am converting it to a suburban gas tank and installing a 5.3/6L80 combo. What size drop springs, if any, would i need to achieve a -3 rear/-1 front drop from stock ride height?

04-19-2014, 09:48 PM	#2
67ctener Registered User Join Date: Oct 2012 Location: Arlington Washington Posts: 1,808	Re: What drop springs do i need You pretty much answered your own question. I don't know if they make a 1" front drop spring but they may. If your worried about the weight factor and how much it affects it just measure before engine swap and adjust from there. The rear tank shouldn't affect the drop enough to notice so you would be fine with a 3" drop spring, again if they make it. More common 2/4 3/5 and 4/6 I know they make those springs/spindles. Good luck

04-19-2014, 09:54 PM	#3
BMERDOC Registered User Join Date: Jun 2011 Location: Richmond,Va Posts: 2,934	Re: What drop springs do i need Just remember your original springs have sagged over the years. If you think you want a 1" drop you may nee a 2". 1, 2 and 3" drop springs are readily available. __________________ Nick Carter 1967 C10 Short bed Fleetside Project Cheap Thrills! 2WD C10 Modern/Performance Alignments Easiest Alignment Ever!

04-19-2014, 09:57 PM	#4
Mr Handy Registered User Join Date: Feb 2013 Location: Spring Hill, Florida Posts: 465	Re: What drop springs do i need You can go with a 1" spring up front for a small block truck, in the back I would think it would depend on if you have a short or long bed. I was shooting for 5" drop in the back if my long bed truck and went with a 4" spring. I would recommend calling ECE and taking with them, they are the best in my experience.

04-21-2014, 07:25 AM	#5
5.3c10 Registered User Join Date: Mar 2014 Location: Savannah, GA Posts: 6	Re: What drop springs do i need Thanks for the responses. I am going to order the 2/4 springs. Would I need to install c-notches for a 4" drop in the rear? Lastly does CPP make quality parts? They offer springs and shocks for 300.

04-21-2014, 11:09 AM	#7
smoked68 Registered User Join Date: Oct 2006 Location: Rock Hill, SC Posts: 421	Re: What drop springs do i need 4/7 drops is what I have, no c-notch. I went with the or re-went with drop spindals in front. Rode like a wagon with drop srings. Now smooth __________________ 1968 chevy shortbed, Dark Shadow Gray 4 bolt 383 Stroker,Weiand Super Charger, disc brakes, 9 inch, 391 gear, 20" Eagle wheels, muncie 4 speed/ Hurst shifter, 4/7 drop, Hedman midlengths, 3 inch exhaust w/ 2 chamber flows. 1966 Mustang with 306 roller, c-4, 9 inch Detroit locker rear. 1965 Fastback Mustang w/347 stroker, top loader 4spd, 9 inch detroit locker. 1966 Mustang coup, 306 roller, c4, 9 inch. 65 Cobra, 427, T6oo, 9inch, of course. First gen Hayabusa, airbox mod and running 2 exhaust cams.. Zoom Zoom Zoom

04-21-2014, 01:05 PM	#8
Mr Handy Registered User Join Date: Feb 2013 Location: Spring Hill, Florida Posts: 465	Re: What drop springs do i need I went with a 5" drop in the back(4"spring on my long bed). I was able to haul a good 500lb of tools and BBQ grill with it a couple weekends ago with absolutely no problem and no c notch.

04-21-2014, 03:53 PM	#9
5.3c10 Registered User Join Date: Mar 2014 Location: Savannah, GA Posts: 6	Re: What drop springs do i need Thank you for the clarification and thanks for the link lolife99. Would 274/40r20 on 20x10 with a -25 offset be too big for a 2/4 drop?



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