I found some cracks in the subframe of my 67. Where can I buy a replacement? And how do I tell a 67-68 from a 69? I have original BB frame towers that I would like to use, so I want to try for a 67-68.
Virgil, I think the only difference between subframes as far as block size is the motor mounts. They unbolt, so keep what you've got and find any 1st generation subframe to replace it with. In addition to first gens, Novas, Omegas, and Ventures (I think) from 72 - 74 used almost the exact same frame. The only difference was the holes drilled for engine mounts and other cosmetic stuff. My 68 has a 73 Nova subframe in it. You'll find this topic in this forum or the body forum archives giving great detail.
Fellow offered me one today, but of course it would be a 75 model.
He said he knew it was 'about' 74 or so., but for free, I had to go look.
I'll find one!! AHHHH the search continues.....
The cracks are running from the right spring 'hole' in the subframe, across the bottom, and up the side of the frame to about 1/2" from the top of the frame. Also, I'm wondering if it has been in a good wreck in it's life, as it looks like the frame is tweaked slightly there, bondo in the pass fender (not sure how deep), stack of shims on pass upper control arm, radiator support to frame bushings being changed, etc, etc. The more I look, the more I see I don't like!
Oh man, you're definitely in need of a frame. I'd also take a look at the 4 mounting points on the body itself for damage. If the carpet and seats are out, you will be able to inspect the two rear ones easily.
I've done a good bit of measuring and the holes seem to be in line with the measurements of a friends car.
I've been all under it with a fine tooth comb, and can find not damage to floors, rocker area, etc, but it has had a 1/4 replaces at some time, many years ago.
I'm in no hurry, as this will be something for the wife and children to ride in too, so I'm not gonna do any shortcuts.
Here is a good visual ID trick for the Camaro vs. Nova etc. frames. The access openings in the large K-member for the lower A-frames is different between the two. The Camaro opening is round (about 1 1/2"). The 72-74 nova etc. frames have a D shaped opening about the same size. So if you find a frame that has a rear mounted power steering pump and D shaped openings, it should work fine.
Of course, take every diagonal measurement you can to check for straightness and comparison to your old frame. On mine, I had to grind off an extension tab behind each motor mount. I'll also end up drilling a couple of holes for the fuel line and other mounting points. Other than that, you couldn't tell the difference.
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