C notch???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HotRod929 · 04-24-2002, 11:20 AM

I want to drop my 1970 C-20 in the rear about 5 inches with drop leaf springs mabe go to 6 inches with shackles. My question is do I need to put a C notch in??? Any help would greatly be apreciated. Thanks

69 longhorn · 04-24-2002, 11:29 AM

You should be able to get by with a 5" drop,& no notch.....if you dont plan on hauling. I think a 6" drop will bottom without the notch.......69 longhorn

HotRod929 · 04-24-2002, 11:40 AM

How hard is it to install a C notch?

72chevyLWB · 04-24-2002, 11:52 AM

If you remove the rubber bumpers after a flip kit you will have about 1/4" space between the axle and the frame, so you do need to do the c-notch. All thats to the c-notch is cutting the hole in the frame and bolting on the notch.

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72 Chevy C/10
87 Chevy Silverado 4X4
www.geocities.com/chevylwb/chevylwb.html
Aberdeen South Dakota

69 longhorn · 04-24-2002, 11:57 AM

I havent installed 1 , but from install pics,it doesnt look too bad. I have a 5" drop on the longhorn(flipped axle,& relocated stock spring brackets,& removed 2 leafs & the flat helper). I have between 3 to 3 1/2 " clearance tween the axle & frame(no bump stops), & havent bottomed anything......69.

70 Jimmy · 04-24-2002, 01:07 PM

Go to the suspension board and check out the C notch topic. I pulled it up for ya.

HotRod929 · 04-25-2002, 03:00 PM

Can you cut the c-notch with a torch? If not how do you do it? Thanks

Slammed67 · 04-25-2002, 04:00 PM

Cutting torch, saw-zal, electric grinder with cut-off wheel, etc.

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Current project: The "HACKstoration" 1967 GMC shortbed/fleetside, 350/700R4, air bag suspension, 18" billet wheels. Other vehicle of interest: 1957 Chevy Bel-Air 4dr hard top, 283/powerglide, lowered 3-1/2" in front and 2 inches in the rear.

Web Site: jaySpot.com AOL Screen Name: Slammed67GMC Location: Kansas City, MO

04-24-2002, 11:20 AM	#1
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	C notch???? I want to drop my 1970 C-20 in the rear about 5 inches with drop leaf springs mabe go to 6 inches with shackles. My question is do I need to put a C notch in??? Any help would greatly be apreciated. Thanks __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

04-24-2002, 11:29 AM	#2
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	You should be able to get by with a 5" drop,& no notch.....if you dont plan on hauling. I think a 6" drop will bottom without the notch.......69 longhorn __________________ http://community.webshots.com/user/hotrodhorn

04-24-2002, 11:40 AM	#3
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	How hard is it to install a C notch? __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

04-24-2002, 11:52 AM	#4
72chevyLWB Got 20's???? Join Date: Oct 2001 Location: Aberdeen SD Posts: 1,451	If you remove the rubber bumpers after a flip kit you will have about 1/4" space between the axle and the frame, so you do need to do the c-notch. All thats to the c-notch is cutting the hole in the frame and bolting on the notch. ------------------ 72 Chevy C/10 87 Chevy Silverado 4X4 www.geocities.com/chevylwb/chevylwb.html Aberdeen South Dakota __________________ 99 Silverado Ex-Cab 2wd, Bagged&WhippleCharged 02 Sierra Ex-Cab 4wd 2500 HD The 72 went down the road.

04-24-2002, 11:57 AM	#5
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	I havent installed 1 , but from install pics,it doesnt look too bad. I have a 5" drop on the longhorn(flipped axle,& relocated stock spring brackets,& removed 2 leafs & the flat helper). I have between 3 to 3 1/2 " clearance tween the axle & frame(no bump stops), & havent bottomed anything......69. __________________ http://community.webshots.com/user/hotrodhorn

04-24-2002, 01:07 PM	#6
70 Jimmy aka Crusher, Crushergmc Join Date: Mar 2000 Location: Oregon Posts: 1,834	Go to the suspension board and check out the C notch topic. I pulled it up for ya. __________________ "KEEP IT DOWN!" 70 Jimmy 454 2wd 56 GMC Big Window "It's funny till someone gets hurt, then it's freakin' hilarious"

04-25-2002, 03:00 PM	#7
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	Can you cut the c-notch with a torch? If not how do you do it? Thanks __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/

04-25-2002, 04:00 PM	#8
Slammed67 Progress = 0% Join Date: Nov 2001 Location: Kansas City, MO Posts: 2,108	Cutting torch, saw-zal, electric grinder with cut-off wheel, etc. ------------------ Current project: The "HACKstoration" 1967 GMC shortbed/fleetside, 350/700R4, air bag suspension, 18" billet wheels. Other vehicle of interest: 1957 Chevy Bel-Air 4dr hard top, 283/powerglide, lowered 3-1/2" in front and 2 inches in the rear. Web Site: jaySpot.com AOL Screen Name: Slammed67GMC Location: Kansas City, MO __________________ Jason - '67 GMC swb \| '57 Bel-Air 4dr hardtop \| '56 210 4dr Wagon \| 2000 GMC Sierra



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