I forgot where I found that on the Internet...
The guy I've been buying parts off of is a huge A-body fanatic and he recently sold a project car to a guy out in red deer and the car was a bare bones 3 speed manual plum crazy purple 1970 swinger 340 and the broadcast sheet called for the steel wheels with hubcaps he said (had FC7 beside the wheel call out as well) He told me they were standard on these cars and I believe him. He's also the guy I bought my 5.5" steelies off of.
Here's some good original ad info as well.
http://www.highdefforum.com/1256504-post4686.html
