Join Date: Aug 2008
Location: Miamisburg, Oh.
Welcome to the site Marvin, I'm a fan of the 67's in particular and also any convertibles.
Do you still have the VIN tag from the door jam that you said had come off, or is it no where to be found??
Just as in any profession, there are some folks who aren't as experienced or educated as others in the same field.
I may be in Ohio, and everyone knows that CA has some special smog/auto laws but I can't believe that that particular CHP guy was 100% correct.
To that point, there are partial VIN numbers on other areas of the car I believe to help in validation. I'm not 100% sure on the Impala, but there are guys here who do know and they may chime in. Other cars have partial VIN's on the radiator Core support, or in the trunk hinge area, on the transmission, etc.
Seems ridiculous that you couldn't weld or repair a section of rusted frame.
There's a restoration forum on this site as well, you might find the guys with answers lurking in there.
You could also try calling a local restoration shop to see if they know, or seek out the local Impala/old cars club or 'Cars and Coffee' get-together! (you should do that anyway!)