Mopar Performance Leaf Springs Part Number Confusion

I'm looking at the Mopar Performance XHD leaf springs on Amazon and Summit Racing, and I'm confused about part numbers.

P4452982
P4452983

Amazon says these springs are for '68-'72 A body cars. Then they go on to say the springs also fit B and E body cars. Hmmm..... ok, news to me.

When I look these numbers up on Summit's site, they say they fit B body cars.

If anyone has Mopar Performance XHD leaf springs, would you please share your part numbers?