I just bought one that came from schnieders, at first I thought it was pretty poor quality, the guy that sold it to me even said I won't like it. I screwed around filing the hinge a bit and lightly pulling some of the lip out to make it work smoothly now I'm glad I bought it. To chop it you just unbolt the top and cut it with a hacksaw then drill two more holes per side, no aluminum welding. Oh yea mines a '31.
Sean
Whoops sorry it's 5am I didn't see the Chevy part. I saw a post on the Hamb where a guy built one out of some angle iron and some strapping.