Big Block Lowering Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

74 stepside · 06-24-2013, 08:29 PM

Im installing a BBC into my 73 1/2 ton. I will have 2.5 drop spindles. Im going to use 3/4 ton BBC coils. How much should I cut to achieve a total of 4" drop on the 1/2 ton?

Liddy71 · 06-24-2013, 08:41 PM

I have one that is bb 2.5 drop spindles I cut one round off for a another 2in drop it was a 3/4 change to 5 lug

manimal · 06-25-2013, 12:26 PM

You pullin apart the 'burb already?

74 stepside · 06-25-2013, 12:29 PM

Quote:

Originally Posted by manimal

You pullin apart the 'burb already?

No, just planning ahead. Having fun driving it.

bohmankid · 06-25-2013, 01:59 PM

I have a 78' big ten. five lug. came stock with the 454.
I've installed a 3" spindle and cut 2 full coils from the spring. It has about a 6 inch drop.
So If you wanted a 4" drop on yours, you should probably only cut off 1 coil which is about 1.5-2 inches. Measure twice, cut once (or multiple times if you want to go lower

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74 stepside · 06-25-2013, 07:37 PM

Looks good. But a 3/4 ton bbc spring is still different than a 1/2 ton bbc spring. Im figuring I might need to cut 2 coils.

Liddy71 · 06-25-2013, 11:05 PM

two coils will be to much the ride will be bad every full coil cut off is 2" of drop

06-24-2013, 08:29 PM	#1
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	Big Block Lowering Question Im installing a BBC into my 73 1/2 ton. I will have 2.5 drop spindles. Im going to use 3/4 ton BBC coils. How much should I cut to achieve a total of 4" drop on the 1/2 ton?

06-24-2013, 08:41 PM	#2
Liddy71 Registered User Join Date: May 2010 Location: Kenova, WV Posts: 821	Re: Big Block Lowering Question I have one that is bb 2.5 drop spindles I cut one round off for a another 2in drop it was a 3/4 change to 5 lug Attached Images

06-25-2013, 12:26 PM	#3
manimal Registered User Join Date: Oct 2006 Location: Southern Kalifornia Posts: 3,066	Re: Big Block Lowering Question You pullin apart the 'burb already? __________________ ------------------------------------------------------ -Lance 2000 Chevy C2500, 5.7, 4L80e 1999 Suburban K2500, 7.4, 4L80e 1980 Camaro..son's car...PROJECT

06-25-2013, 01:59 PM	#5
bohmankid Registered User Join Date: Nov 2012 Location: Salt Lake City, UT Posts: 520	Re: Big Block Lowering Question I have a 78' big ten. five lug. came stock with the 454. I've installed a 3" spindle and cut 2 full coils from the spring. It has about a 6 inch drop. So If you wanted a 4" drop on yours, you should probably only cut off 1 coil which is about 1.5-2 inches. Measure twice, cut once (or multiple times if you want to go lower ) __________________ My 1985 GMC 4x4 LS swap build thread R.I.P. My 1978 Big Ten, Big Block build thread Moby: My Chevy 4x4 ls swap build thread

06-25-2013, 07:37 PM	#6
74 stepside Registered User Join Date: Oct 2009 Location: SoCal Posts: 815	Re: Big Block Lowering Question Looks good. But a 3/4 ton bbc spring is still different than a 1/2 ton bbc spring. Im figuring I might need to cut 2 coils.

06-25-2013, 11:05 PM	#7
Liddy71 Registered User Join Date: May 2010 Location: Kenova, WV Posts: 821	Re: Big Block Lowering Question two coils will be to much the ride will be bad every full coil cut off is 2" of drop

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