Northern radiator issue

[ryans69chevy]

Just bought a new northern radiator through the local radiator shop and I just tried installing it into my new radiator core support as well as the original core support and the radiator doesn't seem to want to fit as good as I expected.

From northern's website it's part number 205179 which states the overall dimensions are 32-3/4X18-3/8x3-1/8. The saddles don't seem to be wanting to line up on the radiator as I think they should. After researching I see a lot of people are measuring their radiators at 34-1/4 which seems more correct to me.
The website says this is for our pickups.

Anybody have any insight on this?

Thanks,
Ryan