Help with 65-70 wheel base length - Impala Tech
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post #1 of 12 (permalink) Old 05-04-2015, 07:26 AM Thread Starter
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Help with 65-70 wheel base length

I posted this in the "brake and suspension" forum yesterday and didn't get any response, so I thought I'd try here.

I have a 1967 2 door hardtop and I'm toying with the idea of doing some serious suspension mods. In order to do this, I'm contemplating swapping out the frame from another "B" body donor car to which I'll do the mods.

Now I'm on the lookout for a donor car, but I need a car with the same wheel base and therein lies my problem. I've been searching on the net looking for the differences in wheelbase lengths of the 2 door, 4 door, station wagons, etc, and all I can find is 119". I'm sure there's a difference between models, but I'm not finding it.

So, my questions are:

1. What's the various wheel base lengths between the different models?
2. I've heard there's some differences between the 65 and 66 frames to create issues with the 67-70 models, can someone explain?
3. Is my assumption correct that another "B" body car from the other 3 makes would be an acceptable candidate for a donor?

Any and all feedback is greatly appreciated,

Rob
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post #2 of 12 (permalink) Old 05-04-2015, 10:27 AM
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So far as I know they al l share the same wheel base. There are not differences as in trucks where they add another two feet to the bed that affects the wheel base. Read here to find out what Chevy wrote about the cars in sales brochures.

http://www.oldcarbrochures.com/stati.../dirindex.html

Big Dave
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post #3 of 12 (permalink) Old 05-05-2015, 10:58 AM Thread Starter
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Thank you Big Dave.

I do find it odd that the wheel base doesn't vary among the different "B" body models. I'm more familiar with the Chevelle, and the 1964-1972 GM "A" body cars do have different wheel base lengths.

Anywho, this revelation opens the door to many more cars as a potential donor for this project.

Thanks again, Rob
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post #4 of 12 (permalink) Old 05-05-2015, 08:42 PM
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65-66 are pretty much the same. 67-70 are different, from 65-66.
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post #5 of 12 (permalink) Old 05-05-2015, 08:47 PM Thread Starter
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Quote:
Originally Posted by dadstoy View Post
65-66 are pretty much the same. 67-70 are different, from 65-66.
Could you expand on that if it's not too much trouble? Is it still possible to use the 65-66 frame on the 67-70 body, but maybe requiring minor tweaks to get it to fit?
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post #6 of 12 (permalink) Old 05-06-2015, 01:48 PM
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They are not that much different. there were some engineering change orders to fix problems such as the difference in the length of the rear control arms changed. So if you get a latter model replacement frame you need to retain the later model rear control arms. Same for the mounting bracket on the power steering gear box to frame. The gear box is universal across all of GM's line up and some Ford and Jeeps also used the same Saginaw gear box. But which of the four bolt holes that were chosen to be used for the mounting position altered slightly to get a better ride with less road noise being transmitted back into the cabin.

Nothing that would render any frame you found from not being useable just having to learn about what was changed from year to year to make sure all the parts bolt up as expected.

Big Dave
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post #7 of 12 (permalink) Old 05-07-2015, 12:53 PM
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Hey Rob- Here are some of your suspension/chassis differences.
- The rear upper control arms are different (shorter) from the 65.
- The 68 convertible haas different body mounts in the center.
- steering box is different from the 65 /66.
- The convertible has two extra mount on the rear for more support.
- The front suspension is different from the 65/66 and 69/70. The pitarm on 65 goes through the frame on 68/69 bolts on the side, the 69/70 uses different center links, 65/68 uses different outer tie rods than the 69/70.The spindles have larger shafts on the 65/66.
- The front upper and lower control arms are the same on 65/70.

Hope that helps!
-Nick

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post #8 of 12 (permalink) Old 05-07-2015, 04:56 PM Thread Starter
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Thanks Nick, that's great info. I appreciate you taking the time to spell all that out. That goes for you too Dave. With out ya'lls input I'd be a lost pup.

Rob
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post #9 of 12 (permalink) Old 05-07-2015, 06:19 PM
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What Nick and Dave said is correct, my computer was down for a couple days. Bumper mounting may need attention also.
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post #10 of 12 (permalink) Old 05-07-2015, 08:47 PM Thread Starter
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Quote:
Originally Posted by dadstoy View Post
What Nick and Dave said is correct, my computer was down for a couple days. Bumper mounting may need attention also.
Thank you Sir for your input, it's much appreciated
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post #11 of 12 (permalink) Old 05-08-2015, 10:19 AM Thread Starter
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NICKE, I sent you a PM
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post #12 of 12 (permalink) Old 10-11-2015, 01:18 AM
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I Have a frame from a 68 impala custom, if interested and the suspension parts
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