Lift determination - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Stout72 · 12-18-2003, 07:48 PM

Anybody know what the distance was between the center of the hubs and the top of the fender well arches, from and rear, on a stock '72 K20 Custom Camper? I'm trying to determine how much suspension lift my truck actually has. There's no body lift. Too many P.O.s and not enough info.

**Yukon Jack** · 12-19-2003, 12:04 PM

My restoration pack for 1969 trucks should be pretty close, but no guarantees that dimensions stayed exactly the same, rather than try to explain the dimensions I will just post the pic for you to go by.

**Yukon Jack** · 12-19-2003, 12:08 PM

Here's pic.

Stout72 · 12-19-2003, 12:29 PM

Thanks, Yukon. I have the resto pack, too, but the dimensions there don't take into account tall tires. I was looking for a shortcut that takes tire size out of the equation. I guess I'll have to do some math. I suspect I have a 4" lift back aft because of the 4" spacer blocks under the rear leaf springs. I can't really tell what I've got up front. It could be 2", there are 2" extenders on the bump stops, but I have no idea what one of the POs was thinking. The truck does have a slight bit of rake to it. My hub center-to-fender arch distance measures 28" both front and rear.

alf4444 · 12-19-2003, 12:36 PM

I just bought a book called 69-81 Blazers. Haven't read it all the way through but I remeber seeing some measurements I think it was ground to bottom of front diff. if that helps let me know and I will look again.

**Yukon Jack** · 12-19-2003, 01:02 PM

The rear pic has the ground to bottom of dif measurement so that should help you. Good luck.

Chevy Punk · 12-19-2003, 11:32 PM

The distance between the hubs and the fenderwell will not change with different size tires

Stout72 · 12-22-2003, 04:36 PM

But that distance does change with a lift. That is my question. I'm going to be in the market for new shocks soon, and since I'll need 8 of them, I'd like to shop for the right ones, length and travel-wise, the first time. Would be good to know exactly how much lift my truck actually has. Since I have no history on what lift kit is in it (except for the Superlift sticker inside the glove box door), I have no idea what a PO installed.

griesel72 · 12-22-2003, 06:42 PM

i just measured mine, 71 K20, no lift and only 80000 miles, so springs should be in good shape. From the center of the back hub (i don't have the front fenders on yet) to the top arch of the back wheel well measures 23 1/4 inches.

Hope this is what you are looking for.

david

Stout72 · 12-23-2003, 04:31 PM

Thanks, David, that helps. Only 80K original mi on a 71? Wow! I should be so lucky. Let me know when you get the front fenders on.

**Stocker** · 12-23-2003, 05:46 PM

Dunno if this will help you at all; just checked the fronts of my 72 K20 with 2 1/2" softride springs - 25 1/4" from hub center to wheel arch. Didn't check the rears because of add-a-leafs in the rear spring packs.

Stout72 · 12-24-2003, 01:28 PM

Yeah, Stocker, that helps. I have 28" hub center-to-wheel arch, for both front and rear. Your front measurements tell me I have a 4" lift up front, not the 2" or 2 1/2" that I thought. Griesel72's rear measurements confirm my 4" lift in the back.

Thanks, guys.

12-18-2003, 07:48 PM	#1
Stout72 Not my good side. Join Date: Mar 2002 Location: Fairfield, California Posts: 222	Lift determination Anybody know what the distance was between the center of the hubs and the top of the fender well arches, from and rear, on a stock '72 K20 Custom Camper? I'm trying to determine how much suspension lift my truck actually has. There's no body lift. Too many P.O.s and not enough info. __________________ 72 Chevy K20 Custom Camper, 350/350, 4" lift, dual shock suspension front & rear. Daily driver and a work in progress. 00 Suburban LT 90 Camaro RS 79 Yamaha XS1100 Special (Ol' Reliable)

12-19-2003, 12:04 PM	#2
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	My restoration pack for 1969 trucks should be pretty close, but no guarantees that dimensions stayed exactly the same, rather than try to explain the dimensions I will just post the pic for you to go by. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 Last edited by Yukon Jack; 12-19-2003 at 12:07 PM.

12-19-2003, 12:08 PM	#3
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	Here's pic. Attached Images __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

12-19-2003, 12:29 PM	#4
Stout72 Not my good side. Join Date: Mar 2002 Location: Fairfield, California Posts: 222	Thanks, Yukon. I have the resto pack, too, but the dimensions there don't take into account tall tires. I was looking for a shortcut that takes tire size out of the equation. I guess I'll have to do some math. I suspect I have a 4" lift back aft because of the 4" spacer blocks under the rear leaf springs. I can't really tell what I've got up front. It could be 2", there are 2" extenders on the bump stops, but I have no idea what one of the POs was thinking. The truck does have a slight bit of rake to it. My hub center-to-fender arch distance measures 28" both front and rear. __________________ 72 Chevy K20 Custom Camper, 350/350, 4" lift, dual shock suspension front & rear. Daily driver and a work in progress. 00 Suburban LT 90 Camaro RS 79 Yamaha XS1100 Special (Ol' Reliable)

12-19-2003, 12:36 PM	#5
alf4444 Registered User Join Date: Dec 2002 Location: taylorsville, UT Posts: 778	I just bought a book called 69-81 Blazers. Haven't read it all the way through but I remeber seeing some measurements I think it was ground to bottom of front diff. if that helps let me know and I will look again. __________________ 2011 CCSB GMC 2500HD DMAX 73 GMC 3/4 ton 4x4 96 Chevy 1500 STD Cab Shortbed Z71 Owner of WickedWolfRC.com

12-19-2003, 01:02 PM	#6
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,686	The rear pic has the ground to bottom of dif measurement so that should help you. Good luck. __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

12-19-2003, 11:32 PM	#7
Chevy Punk Registered User Join Date: Apr 2002 Location: Blaine WA Posts: 455	The distance between the hubs and the fenderwell will not change with different size tires

12-22-2003, 04:36 PM	#8
Stout72 Not my good side. Join Date: Mar 2002 Location: Fairfield, California Posts: 222	But that distance does change with a lift. That is my question. I'm going to be in the market for new shocks soon, and since I'll need 8 of them, I'd like to shop for the right ones, length and travel-wise, the first time. Would be good to know exactly how much lift my truck actually has. Since I have no history on what lift kit is in it (except for the Superlift sticker inside the glove box door), I have no idea what a PO installed. __________________ 72 Chevy K20 Custom Camper, 350/350, 4" lift, dual shock suspension front & rear. Daily driver and a work in progress. 00 Suburban LT 90 Camaro RS 79 Yamaha XS1100 Special (Ol' Reliable)

12-22-2003, 06:42 PM	#9
griesel72 Senior Member Join Date: Apr 2003 Location: Howard, Kansas USA Posts: 1,997	i just measured mine, 71 K20, no lift and only 80000 miles, so springs should be in good shape. From the center of the back hub (i don't have the front fenders on yet) to the top arch of the back wheel well measures 23 1/4 inches. Hope this is what you are looking for. david __________________ 1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife

12-23-2003, 04:31 PM	#10
Stout72 Not my good side. Join Date: Mar 2002 Location: Fairfield, California Posts: 222	Thanks, David, that helps. Only 80K original mi on a 71? Wow! I should be so lucky. Let me know when you get the front fenders on. __________________ 72 Chevy K20 Custom Camper, 350/350, 4" lift, dual shock suspension front & rear. Daily driver and a work in progress. 00 Suburban LT 90 Camaro RS 79 Yamaha XS1100 Special (Ol' Reliable)

12-23-2003, 05:46 PM	#11
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,749	Dunno if this will help you at all; just checked the fronts of my 72 K20 with 2 1/2" softride springs - 25 1/4" from hub center to wheel arch. Didn't check the rears because of add-a-leafs in the rear spring packs. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

12-24-2003, 01:28 PM	#12
Stout72 Not my good side. Join Date: Mar 2002 Location: Fairfield, California Posts: 222	Yeah, Stocker, that helps. I have 28" hub center-to-wheel arch, for both front and rear. Your front measurements tell me I have a 4" lift up front, not the 2" or 2 1/2" that I thought. Griesel72's rear measurements confirm my 4" lift in the back. Thanks, guys. __________________ 72 Chevy K20 Custom Camper, 350/350, 4" lift, dual shock suspension front & rear. Daily driver and a work in progress. 00 Suburban LT 90 Camaro RS 79 Yamaha XS1100 Special (Ol' Reliable)



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.