What year Dakota manifolds to use?

I'm using a '93 on the passenger side and a hp340 manifold on the drivers side. The outlets both measure the same but I don't remember if there 2 1/8 or 2 1/4.

'93 on the driver side would not fit past the steering.

I just saw you have a '66. I'm working on a '67. I'm not sure what fits on the earlier body style.