I mocked up Magnum heads, block, and timing cover, along with a dual pattern intake manifold. The 91 Dakota AC bracket does fit the Magnum timing cover, would clear the Magnum serpentine driven water pump and Magnum valve covers. It allows lots of room around the thermostat housing.
The negatives make it expensive, I would think. The Dakota thermostat housing will NOT work on the dual pattern intakes. The Dakota housing has mounting bolts that are roatated away from the standard LA position.
You would have to use an LA style thermostat housing and figure out an upper radiator hose that would come over the alternator, like a factory Magnum hose does.
The Magnum AC compressor that is readily available does not match the mounting area of the Dakota bracket, so it would require buying the compressor that fits the 91 Dakota. A quick search showed the serpentine version available as a remanufactured part only. I did not verify the rib count of the belts yet, and did not look further for Dakota AC compressor availability.
It looks like this bracket would work, but there would be no cost savings. Best bet is still to sell the dual pattern intake to someone running without AC, then invest in a real Edelbrock Magnum intake when using factory Magnum serpentine belt drive with factory Magnum AC setup and bracket.
You could fab some new brackets to mount the AC compressor or modify the factory Magnum bracket to move the compressor up, but now it gets pretty time consuming.
I'll put pictures of the mock-up in another post, since I already rambled on too much.
