Rear bumper bracket holes in frame - The 1947 - Present Chevrolet & GMC Truck Message Board Network

64chevmn · 07-08-2021, 02:53 PM

I working on a 1968 C10 basket case project that was abandoned by the two previous owners. One of them cut the frame down to a short bed but did not drill any of the holes in the rear frame rails for the bumper brackets or the bolts holes that hold the box to the frame. Does anybody have a template with the locations or measurements of these holes?

gmc684x4 · 07-08-2021, 03:32 PM

Did they cut the frame down properly ?
Cut 12 inch's mid frame and 8 inch's back frame of the truck
This is to get the axle centre in the short box wheel well

I ask this I have a parts truck where its all cut behind the axle by a previous owner

64chevmn · 07-08-2021, 04:08 PM

it appears to be cut correct, but i just got back from the frame shop that verified everything is in the right spots. They did a few minor tweaks to get everything square but overall it was cut correctly....but the previous owner butt welded the frame together and I had to weld 1/4" thick fishplates on the inside of the frame to reinforce everything.

Hotcorner · 07-08-2021, 05:10 PM

Quote:

Originally Posted by 64chevmn

I working on a 1968 C10 basket case project that was abandoned by the two previous owners. One of them cut the frame down to a short bed but did not drill any of the holes in the rear frame rails for the bumper brackets or the bolts holes that hold the box to the frame. Does anybody have a template with the locations or measurements of these holes?

. What about clamping the desired bumper in place and using the bumper brackets as your template for where to drill the frame?
Posted via Mobile Device

**70STOVEBOLT** · 07-08-2021, 09:05 PM

Leaf springs or coil?

64chevmn · 07-08-2021, 10:01 PM

Coil spring rear....the frame is completely tore down and without the box on the frame i don't know how far back or up and down the bumper brackets need to be to fit correctly when the box finally goes back on.

**70STOVEBOLT** · 07-09-2021, 08:38 AM

I will do some measuring tonight after work and post the measurements.

**70STOVEBOLT** · 07-09-2021, 04:48 PM

Looks like the rear hole is 1.5” from the end of the frame, up 1.75”. The front hole is 6.375” from the end of the frame, up 2.5”. All bolts are half inch, so the holes should be 9/16”. This is for a coil spring truck using a sport bumper. I will post a pic shortly.

**70STOVEBOLT** · 07-09-2021, 04:50 PM

Pic

64chevmn · 07-09-2021, 06:44 PM

Perfect; exactly what i was looking for....THANK YOU

**70STOVEBOLT** · 07-11-2021, 08:15 PM

Glad to help

07-08-2021, 02:53 PM	#1
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Rear bumper bracket holes in frame I working on a 1968 C10 basket case project that was abandoned by the two previous owners. One of them cut the frame down to a short bed but did not drill any of the holes in the rear frame rails for the bumper brackets or the bolts holes that hold the box to the frame. Does anybody have a template with the locations or measurements of these holes?

07-08-2021, 03:32 PM	#2
gmc684x4 Registered User Join Date: Jul 2012 Location: Whitehorse yukon Posts: 1,218	Re: Rear bumper bracket holes in frame Did they cut the frame down properly ? Cut 12 inch's mid frame and 8 inch's back frame of the truck This is to get the axle centre in the short box wheel well I ask this I have a parts truck where its all cut behind the axle by a previous owner

07-08-2021, 04:08 PM	#3
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Re: Rear bumper bracket holes in frame it appears to be cut correct, but i just got back from the frame shop that verified everything is in the right spots. They did a few minor tweaks to get everything square but overall it was cut correctly....but the previous owner butt welded the frame together and I had to weld 1/4" thick fishplates on the inside of the frame to reinforce everything.

07-08-2021, 09:05 PM	#5
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: Rear bumper bracket holes in frame Leaf springs or coil? __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-08-2021, 10:01 PM	#6
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Re: Rear bumper bracket holes in frame Coil spring rear....the frame is completely tore down and without the box on the frame i don't know how far back or up and down the bumper brackets need to be to fit correctly when the box finally goes back on.

07-09-2021, 08:38 AM	#7
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: Rear bumper bracket holes in frame I will do some measuring tonight after work and post the measurements. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-09-2021, 04:48 PM	#8
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: Rear bumper bracket holes in frame Looks like the rear hole is 1.5” from the end of the frame, up 1.75”. The front hole is 6.375” from the end of the frame, up 2.5”. All bolts are half inch, so the holes should be 9/16”. This is for a coil spring truck using a sport bumper. I will post a pic shortly. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-09-2021, 04:50 PM	#9
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: Rear bumper bracket holes in frame Pic Attached Images __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-09-2021, 06:44 PM	#10
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Re: Rear bumper bracket holes in frame Perfect; exactly what i was looking for....THANK YOU

07-11-2021, 08:15 PM	#11
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,254	Re: Rear bumper bracket holes in frame Glad to help __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear



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