You have found the right place for info. here.

Having recently gone through this for my 70, I can verify what Carl says in that you're looking for a 67-68 Canadian Pontiac or Chevrolet B-body (Impala, Biscayne, etc) non-convertible frame.   65-66 are the same, 67-68 are the same, and 69-70 are the same.  I put a 69 Parisienne 2+2 hardtop chassis under my 70 Parisienne hardtop last summer.

I think in theory a convertible frame can be used, but the bottom edge of them is wider than the non-convertible frame, and henceforth the convertible crossmember is narrower than a non-convertible crossmember.  (that's why convertible crossmembers cost more)

To be honest, I think the only differences between the 67-68 and the 69-70 frames may just be the frame horns that the bumper bolts to.

Here's a couple photo's of the soft chassis that was under my 70:

 

I have a 67 Impala 2 door hardtop. The frame was toast. I had some time to research this and Brian Owens of Whitby worked for me for a while and then he took a position with Hunter selling alignment machines. Brian was able to get the frame data sheets for my 67 and compared them to the 68 and they were the same.

My search ended when Brian called me up and said that there was a California 68 Station Wagon that was destined for the crusher that day.
I hurried over and upon inspection found out that the wagon had the 4 piston Corvette style disc brake option. The motor had been taken out reports say it was a massive big block.....
I paid 35.00 and the owner towed it to my shop.

The vehicle was put on the hoist and all of the body mounts disconnected and the following morning the tow truck came and wrapped a chain through the roof and presto I had a frame.

The frame went to the metal laundry and came out sparkling. One small repair and it was epoxy enameled. Spent the winter installing new parts and in the spring the body went on the "new" frame.

There was one bolt at the rear that had to be adjusted but all fit easily.

I have had the car now for 36 years and upgraded stuff along the way.

Unfortunately I lost my binder documenting all of the work that has gone into the car or I could get you the frame sheets.

Hope this helps shed some light on the subject

Cliff

 

Check the Sept 1 2014 issue of Old Autos fora detailed story of my attachment to this car.    Issue # 17 for 2014

-- Edited by oshawacliff on Tuesday 3rd of February 2015 08:39:24 PM

http://www.ebay.com/itm/1967-Chevrolet-Impala-SS-427-396-327-convertible-frame-chassis-/111194351816?pt=Vintage_Car_Truck_Parts_Accessories&hash=item19e3b328c8&vxp=mtr

Awesome, nice to have some info coming in. I would love to hear from some more people so that we can confirm whether a convertible frame can be used or not. I was under the impression that the station wagon frames were the same as a convertible. So if Oshawacliff used one on his 1967 hardtop, then maybe a convertible frame can be used... I will give Dave a call and see what he has, it just sucks that it is on the Island as that instantly adds a ton of money and hassle. Ideally I want to spend as little as possible on a donor frame but I guess under $1000 will probably have to happen. This build is on a pretty tight budget so the cheaper the better.

So, so far we have pretty concrete info that a 1967-1968 impala frame will work, just not sure about convertibles. I have a lead on two different 1968 convertible impalas so it would be nice to hear from someone who knows for sure about this.

Thanks, for all the info so far.

This guy has other chassis parts for 68. Maybe a frame?

http://vancouver.craigslist.ca/rds/pts/4851071961.html

Just a thought....if the frames are identical for 1965-1966 and then it changes but is the same for 1967-1968 frames. Then why would my 1967 car have stamped numbers on the frame showing its a 66 frame? Maybe the 65-66 frames will work? I have contacted the Craigslist ad for the car above, just waiting on some decent pics before I go to the island to check it out. Anyone know if my frame should have a vin stamped on it? Any hints to where it should be? I cleaned up a bunch of areas that I saw from a Chevy site but no luck...would love to confirm what my frame is from.

That was one of the first places we cleaned but I think the metal is so corroded that the stampings might have been lost in the severe pitting on the surface...

This car I believe is still available. It was parked in a carport on concrete for years. It's been moved to the lawn for the last year. I no longer live there to look at it again, but this might have a good frame.

http://canadianponcho.activeboard.com/t53853013/67-laurentian-summerland-bc/

I have never looked for the vin on a full size but I'm told it's on top of the frame rail behind the rear wheel.

Correct...the VIN is on top of the frame rail on the passenger's side behind the rear wheel....

 Here is what you need.  1967 Pontiac Parisienne 2 door H.T. 2+2.

Have you tried searching for just a station wagon frame.    Probably harder to find but you know how things are hidden on the big wide web

 

Cliff