Bed Cross Sills Uneven - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**damnyankee36** · 04-01-2018, 06:07 PM

I am mocking up the bed on the 66 and noticed that the tops of the sills are in alignment from front to back except for the rear one. It's about 1/4"-3/8" lower than the front three.

It's been years since I last test fit the bed and I don't remember this issue back then.

Am I missing something here?

**Clyde65** · 04-01-2018, 06:39 PM

Picture would help

**damnyankee36** · 04-01-2018, 08:33 PM

Here ya go. With a straight board laying across the front three sills, you can see the gap between the rear of the board and the rear sill.

BR3W CITY · 04-02-2018, 11:10 AM

Are all your panels and sills from the same truck? When I was redoing my bed in the '66 post accident, I realized my donor front panel and one sill was different. There was a steel floor available in the 70's which doesn't have the thickness of the boards, and the floor sat a bit lower...but otherwise they fit the same.

**PGSigns** · 04-02-2018, 11:23 AM

Were the bed sides assembled? My 66 was off just a little and the back has one 1/8" thick washer under it and I just pulled the boards down the last little bit.
Jimmy

**The Rocknrod** · 04-02-2018, 02:14 PM

I would think that once the entire bed is put together you'd see another problem. I wouldn't fit the wood the way you have it now, things may change dimension wise once its all together.

**damnyankee36** · 04-02-2018, 07:30 PM

Quote:

Originally Posted by PGSigns

Were the bed sides assembled? My 66 was off just a little and the back has one 1/8" thick washer under it and I just pulled the boards down the last little bit.
Jimmy

At one point they were. Before I saw the gap you see in the pic, everything was bolted down and snugged and I noticed a small gap between the bottom of the bedsides and the rear sill. Right where the factory welded that small bead. I noticed everything was under stress as I was disassembled the bed. After seeing this I could see why.

Quote:

Originally Posted by BR3W CITY

Are all your panels and sills from the same truck? When I was redoing my bed in the '66 post accident, I realized my donor front panel and one sill was different. There was a steel floor available in the 70's which doesn't have the thickness of the boards, and the floor sat a bit lower...but otherwise they fit the same.

Yes, everything is original to the truck except the bedsides. The front three sills are all the same height too.

Quote:

Originally Posted by The Rocknrod

I would think that once the entire bed is put together you'd see another problem. I wouldn't fit the wood the way you have it now, things may change dimension wise once its all together.

Exactly my thought!

A simple shim at both attach points on the rear sill should take care of this but I'd like to why I am having this issue before I do.

**The Rocknrod** · 04-02-2018, 07:53 PM

Quote:

Originally Posted by damnyankee36

...
A simple shim at both attach points on the rear sill should take care of this but I'd like to why I am having this issue before I do.

Until it's all together you really dont know what you have. It's all a guess or shot in the dark. And I'm talkin no light!

04-01-2018, 06:07 PM	#1
damnyankee36 Senior Member Join Date: Sep 2002 Location: Alamogordo, NM Posts: 724	Bed Cross Sills Uneven I am mocking up the bed on the 66 and noticed that the tops of the sills are in alignment from front to back except for the rear one. It's about 1/4"-3/8" lower than the front three. It's been years since I last test fit the bed and I don't remember this issue back then. Am I missing something here?

04-01-2018, 06:39 PM	#2
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Bed Cross Sills Uneven Picture would help __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

04-01-2018, 08:33 PM	#3
damnyankee36 Senior Member Join Date: Sep 2002 Location: Alamogordo, NM Posts: 724	Re: Bed Cross Sills Uneven Here ya go. With a straight board laying across the front three sills, you can see the gap between the rear of the board and the rear sill. Attached Images

04-02-2018, 11:10 AM	#4
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Bed Cross Sills Uneven Are all your panels and sills from the same truck? When I was redoing my bed in the '66 post accident, I realized my donor front panel and one sill was different. There was a steel floor available in the 70's which doesn't have the thickness of the boards, and the floor sat a bit lower...but otherwise they fit the same. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

04-02-2018, 11:23 AM	#5
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Bed Cross Sills Uneven Were the bed sides assembled? My 66 was off just a little and the back has one 1/8" thick washer under it and I just pulled the boards down the last little bit. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

04-02-2018, 02:14 PM	#6
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Bed Cross Sills Uneven I would think that once the entire bed is put together you'd see another problem. I wouldn't fit the wood the way you have it now, things may change dimension wise once its all together. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?



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