The last generation Dodge vans from 1998 to 2003 had the engine dog house moved much closer to the firewall. The passenger legroom is much better because you can swing your legs in behind the housing along with beside it allowing some fidgeting on long trips.
Pure conjecture on my part, but I think they narrowed the dog house and moved the engine closer to the vehicle centerline.
Leggs is not fond of the 1979 with the 440. Not much room, a dip in the floor beside the wheel well, and she has the new seats back so far she claims the passenger window is in front of her limiting her view substantially.
She is, however, still a great cook so I accept her comments.