mopar intake

I can't really find a absolute answer even after a Google search but if memory serves me correct the original M! manifold didn't have holes for the heater hose and temp sender to screw into and later they added that. maybe you got a newer version with the extra holes?? Just a guess.

The only other thing I'd say if that isn't correct is look at the bolt holes where it bolts to the head. Are they angled like LA engines or straight up and down like Magnum engines? Maybe that's the difference? Just another guess.