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02-01-2023, 05:47 PM | #1 |
Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 882
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About Pancaking Crossmembers
On my 67, Im thinking down the road about a further drop, I'd like to lay frame one day, and would like to keep it inexpensive (meaning no aftermarket backhalfs or crossmembers). Im curious on how close I can get to laying frame with a big notch rear, and pancaking front crossmember 2 inches? I'd like to NOT cut into the factory floor, so z-ing the frame is kind of out of my things-to-consider list. Pics would be appreciated too.
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"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
02-01-2023, 10:18 PM | #2 |
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Join Date: Jun 2014
Location: Mocksville, NC
Posts: 1,760
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Re: About Pancaking Crossmembers
On my truck I tried to take the budget approach to get it as low as I could without buying anything other than standard lowering parts (springs, drop spindles, blocks). In the front I sectioned the crossmember 1.5". Any more than that and you are going to have to upgrade your steering (think rack and pinion). For the rear, I z-ed the frame just behind the cab so I could still use the factory rear suspension. Of course, this required raising the bed floor to accommodate, but you will need to modify the bed floor if you want to get anywhere near laying frame. I also dropped the body 1", which did require cutting a small hole in the cab floor. All in, I am at a 8/10 drop static. If I bagged my truck I miiight be able to lay frame. It's going to take a lot of figuring and creativity to lay frame without the help of aftermarket goodies, but I think it can be done.
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Builds: Green Gus the 68 C10 | Bluey the 72 1500 | Lowly the 70 C10 - Instagram: @dr.hewitt - C10 Concept/Development Photos: Master Thread |
02-02-2023, 01:29 PM | #3 |
Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 882
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Re: About Pancaking Crossmembers
Thanks for the pictures and explanation! Did sectioning the crossmember need any floor mods or just the body drop itself?
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"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
02-02-2023, 03:32 PM | #4 |
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Join Date: Jun 2014
Location: Mocksville, NC
Posts: 1,760
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Re: About Pancaking Crossmembers
Just the body drop required cutting the cab floor. Sectioning the crossmember required notching the LF upper control arm to clear the steering shaft. You may also need to do some clearancing for your tierods. Mine were hitting the crossmember on the front lower edge. This was at 1.5" sectioning. At 2" you are going to exaggerate this interference.
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Builds: Green Gus the 68 C10 | Bluey the 72 1500 | Lowly the 70 C10 - Instagram: @dr.hewitt - C10 Concept/Development Photos: Master Thread |
02-02-2023, 05:46 PM | #5 |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,031
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Re: About Pancaking Crossmembers
Transmission type will impact floor requirements so that's something to keep in mind. Some transmissions are porkier than others so they might require the 'tall' bolt-in style 4x4 hump for the tunnel vs the standard shallower 2x4 hump.
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02-03-2023, 11:31 AM | #6 |
Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 882
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Re: About Pancaking Crossmembers
Makes sense. My 700R4 isnt too large, but Im sure its probably a tight clearance. Ill have to see when I get the cab back on the chassis. Im just trying to make plans for next year when I start piling parts to bag it, so nothing really set in stone at the moment.
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"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
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bagged, crossmember, drop, pancake |
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