10-12-2019, 08:55 PM | #1 |
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Truck trivia
Thought a thread might be cool with trivia many enthusiasts may be unaware of. I know of a few, but will start with one I recently learned.........
The frame rails on a BBC have cut-outs to allow clearance for the exhaust manifolds. Here's a pic. of the RH side. Edit: Probably a false rumor A 67 frame seems to differ from the others, because a 67 didn't take a BBC. Someone mentioned a 68 differs as well.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-24-2019 at 11:42 AM. |
10-12-2019, 09:37 PM | #2 |
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Re: Truck trivia
This will be a good thread. I love to learn something new every day. Just went out and took a peek at the '70 and it also has the cut outs on the frame rails like yours. I knew I was missing something! BTW, that frame and engine look awesome!
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10-13-2019, 12:56 AM | #3 | |
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Re: Truck trivia
Quote:
For this thread, myth busting is good too, stuff gets lost, it's been 50 years. One example I came across after much research involves the idea a 402 BBC with A/C came with a fuel return line. First off it has nothing to do with A/C. Couldn't tell you exactly why, but it involves a 400TH transmission. Prior to 72 a 402/400TH didn't have a return line, 72 they did. Then you have dealerships that sell two different fuel pump to carb. hard lines for a 402. One "with A/C", and the other without. I haven't confirmed it yet, but it LIKELY has nothing to do with A/C. In other terms, they "fell" for the myth as well. The difference is the fuel pump, not A/C, simply because a return line requires a deeper pump.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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10-13-2019, 11:53 PM | #4 |
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Re: Truck trivia
I had heard that the wood beds in many of these trucks was to give livestock a better grip when they were transported.
Can anyone confirm or bust the myth?
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10-14-2019, 12:01 AM | #5 | |
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Re: Truck trivia
Quote:
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10-14-2019, 08:44 AM | #6 |
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Re: Truck trivia
That is true.Then pipe stock racks came along with a built in wood floor that you could slide in the box so you didn’t need the wood bed anymore.
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10-14-2019, 09:17 AM | #7 | |
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Re: Truck trivia
Quote:
"The frame rails on a BBC have cut-outs to allow clearance for the exhaust manifolds." I thought the 67 frame is the only one that needs to be clearanced for a big block ?
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10-14-2019, 09:45 AM | #8 | |
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Re: Truck trivia
Quote:
For example: At one point, the cab high running lights were tied to California emissions. What do running lights have to do with engine emissions, you may ask? Nothing. But the Federal lights were all amber; California had a law specifying that no amber lighting could be visible from the rear of the vehicle, necessitating a specific part that was blacked out. Tying these to California emissions was an easy way to make sure the correct regulated part went to the right geographical area. K
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10-14-2019, 11:34 AM | #9 | |
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Re: Truck trivia
Quote:
All I know is I've seen a lot of frames without those cutouts. Might be a year thing.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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10-15-2019, 09:53 AM | #10 |
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Re: Truck trivia
All 3 frames I have have the cutouts. My 71 C10 the ramp truck and my daughter 68 step all have it.
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10-15-2019, 10:17 PM | #11 | |
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Re: Truck trivia
Quote:
I just re-read that old thread. Sounds like 67, possibly 68 and 69-72 were different frames. http://67-72chevytrucks.com/vboard/s...d.php?t=784551
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 10-15-2019 at 10:31 PM. |
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10-16-2019, 12:39 PM | #12 |
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Re: Truck trivia
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10-21-2019, 08:25 AM | #13 |
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Re: Truck trivia
I believe all '68-'72 frames are made the same, to accept any engine offered in that year.
I think the '72 BBC fuel return line only with A/C is related to the A/C to try to cool fuel since A/C tends to bring the temperature up. And the pump to carb fuel line for A/C-only is A/C related because w/AC requires a different pump.
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10-24-2019, 11:38 AM | #14 | |
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Re: Truck trivia
Quote:
Per the book the change occurred in 1972. Couldn't tell you why, but according to the book a 1972 402 with 400 transmission had a return line. I'd only be speculating why the change.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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