Those years are significantly different, according to this illustration and following pages.
Not to say that what they sent you wouldn't work. Hope you can get it sorted out.
I used that information I linked to to fabricate lines for my '51 3100. The info was spot on.


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.