[/[b]b]Don’t know if this will help with the discussion, but in working this stage on my ‘46 Chevy 1/2 ton I had the same problem. It was discovered there was in fact a difference between the products sold by Steele and Jim Carter’s. The Steele sweeps were wider diameter than those sold by Carter’s. A photo is attached showing the difference discovered. The Carter’s product was ultimately used. This experience was about 4 years ago, so their products might be different now. PLEASE SEE EDIT BELOW
EDIT on 12/12/2022: In helping figure this out and doing more digging and cross checking this is what I found. The Steele product was used on the outside channel and the Jim Carter product on the inside. Using all of one product or the other led to either to tight a fit to allow the window cranks to operate as needed, in one case, Steel. In the other the rubber was too narrow and didn’t “sweep” the window at all because of it didn’t sufficiently fit against the glass.
((A side note: A similar issue was experienced with the rubber cowel vent gasket. But, In that case the Steele gasket fit better than the Carter’
