What year Dakota manifolds to use?

For what it's worth I put a 92-02 magnum truck manifold on my '69 Barracuda. I think your car is a little smaller. I scrounged around on craigslist (statewide) until I found someone selling a 340 driver's side for $150. The mag truck manifold is 2 1/4" exit , 340 a little bigger maybe a 1/16". Had to rotate the 90 degree oil filter and reroute the exhaust otherwise no problem. Well, you may have one problem (could be a deal breaker). The mag truck manifold has a much larger exhaust port, I mean it's gigantic (great for horsepower). It fits over the 360 heads off the mag truck. The 360 heads have a smog port so the manifold had to be made with a large port ( I can post pics if you like) to cover the smog port. I actually had to put a set of 302 casting heads on the car so the mag truck manifold would work. The 302s have a larger area for the manifold to seal on. Anyway it worked great!! I ended up with about 1/2" clearance on passenger's side. See the pics...

Treblig