A-body convertible frame Q & A - Chevelle Tech

Convertibles Convertible Q & A's

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post #1 of 47 (permalink) Old Mar 16th, 07, 8:16 PM Thread Starter
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Jim
 
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A-body convertible frame Q & A

Ok guys this seems to be a pretty common question so lets do a sticky on it .

Question: What frame will fit my 68-72 convertible Chevelle?

Answer: Any frame from a 68-72 CONVERTIBLE A-body which means Chevelle, Cutlass, 442, Skylark, GS, GTO and LeMans. Hint- If you are buying a parts convertible for the frame then make sure it has a boxed frame! Some folks swapped out their hardtop frames with ragtop frames for racing.

Question: Can I use a 68-72 El Camino frame? They are boxed after all...

Answer: No you cannot just bolt one of those in. The section between the wheels (the boxed part) is longer by about 4".

Question: How about a hardtop frame?

Answer: Nope as it isn't boxed. IF you are good with a welder and the boxed part on your original frame isn't toast then you can cut out the boxed part and weld it in or you could try making your own boxes for it.

Now if someone else can fill in the 64-67 frame info it would be greatly appreciated.

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post #2 of 47 (permalink) Old Jun 15th, 07, 12:42 AM
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Re: A-body convertible frame Q & A

What about a 4 door? 68-72.

Rich

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post #3 of 47 (permalink) Old Jun 16th, 07, 12:28 PM
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Re: A-body convertible frame Q & A

Quote:
Originally Posted by jnorth View Post

Now if someone else can fill in the 64-67 frame info it would be greatly appreciated.
1966 (and probably 1967):

The sedan, coupe, and convertible frames are the same length with the body-mount positions in the same locations. Of the three applications, only the convertible is boxed in the area between the forward mount positions and trailing arm mounts.

The El Camino (also boxed) and station wagon (boxed?) frame is 3.27" longer than the convertible frame (according to the Fisher Chassis Service Manual). However, the extra length is in the area between the two mount positions behind the C-notch, so it is somewhat straightforward to section it there. That area of the frame isn't boxed, so clamping and welding should not be very difficult. I haven't done it, but I've seen websites where folks have described the process.

Not sure if this holds for any year other than '66, but:

The diameter of the holes of the mount positions below the doors measure nominally 1.21", where as all the other positions measure in at nominally 1.43". I have yet to find a "convertible" body mount bushing kit that has bushings for the smaller hole. I've trimmed two to fit my frame.


Paul Gustavson
1966 POS Malibu Convertible
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post #4 of 47 (permalink) Old Jun 30th, 07, 2:08 PM
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Re: A-body convertible frame Q & A

the 4 door is the same as the elcamino i think same wheel base i think as elcamino,4-door, and wagon dunno i think those are the same
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post #5 of 47 (permalink) Old Jul 12th, 07, 8:55 AM
 
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Re: A-body convertible frame Q & A

Buick GS models....coupe versions use the convertible frame for the 65-67 years.

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post #6 of 47 (permalink) Old Jul 24th, 07, 10:53 AM
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Re: A-body convertible frame Q & A

Would the frame on a 67 olds cutlass station wagon be the same as the 67 elcamino & chevelle wagon? Would it be boxed?

In view of the response regarding 65-67 Buick GS frames, what about the 65-67 olds 442 or olds cutlass modles, Would they have boxed frames?
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post #7 of 47 (permalink) Old Jul 24th, 07, 11:48 AM
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Re: A-body convertible frame Q & A

Quote:
Originally Posted by james a larson View Post
Would the frame on a 67 olds cutlass station wagon be the same as the 67 elcamino & chevelle wagon? Would it be boxed?
Typically, these should not be boxed. the Chevelle wagon was not boxed, as the roof will help keep the body from folding...


The El Camino is boxed, because the roof does not extend rearward enough to provide the additional support for the body.

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post #8 of 47 (permalink) Old Jul 26th, 07, 7:38 PM
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Re: A-body convertible frame Q & A

Quote:
Originally Posted by 1966_L78 View Post
...the Chevelle wagon was not boxed...
Thanks, that clears things up - my post above could possibly have led someone astray...

Paul Gustavson
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post #9 of 47 (permalink) Old Jul 26th, 07, 10:00 PM
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Re: A-body convertible frame Q & A

1969 through 72 Pontiac Grand Prix have boxed frames, the length of the boxing is the same as the 68-72 chevelle convertible. The frame is not the same. Last year when restoring my 68 I used the boxing from a 70 G P and a 68 hardtop frame to build the frame for my car. Worked great!!! Grand Prix-- Great donor cars --disc brakes--tilt wheel--seats--etc.
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post #10 of 47 (permalink) Old Oct 17th, 07, 12:48 PM
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Re: A-body convertible frame Q & A

I need a frame for my '69 convertible. I found a '70 Grand Prix frame. Any tips on making this work? I've heard the extra length is in the front to support the larger hood on the Grand Prix...
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post #11 of 47 (permalink) Old Nov 22nd, 07, 11:48 PM
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Re: A-body convertible frame Q & A

A 70 Grand Prix is a B Body I believe. If it is only longer in the front (like a 70-72 Monte Carlo is), your Chevelle steering column will not work as the cars with longer frame horns take longer steering columns.

Tom Rightler, MCC VP & Newsletter Editor
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post #12 of 47 (permalink) Old Nov 26th, 07, 4:03 PM
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Re: A-body convertible frame Q & A

This diagram of frame dimensions may help answer some questions.
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post #13 of 47 (permalink) Old Nov 29th, 07, 5:32 PM
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Re: A-body convertible frame Q & A

Vern,
Do you have any info on early Chevelle/El Camino? I need to know difference between the transmission crossmember of '64 El Camino/Chevelle convertible (boxed frame) versus the hardtop (open frame).
thanks,

trannyman
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post #14 of 47 (permalink) Old Nov 29th, 07, 5:36 PM
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Re: A-body convertible frame Q & A

Tony,

I am looking for some help to identify difference between a transmission crossmember for a '64 El Camino/Chevelle convertible (boxed frame) versus the Chevelle hardtop (open frame). I have a hardtop - but need to make a crossmember for the '64 El Camino. I don't have access to El Camino or convertible.
thanks,

trannyman
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post #15 of 47 (permalink) Old Nov 30th, 07, 9:41 PM
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Re: A-body convertible frame Q & A

Trannyman,I got those sheets out of a package I bought on Ebay.They are called "crash sheets".Use that in the search box on ebay and you wil find it.The seller was Petes Auto Data.They range in price but are all around ten bucks.He does have some for 64-65.
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