Magnum Serpentine on a '91 TBI 318? Without changing the intake?

Is that a 6 rib belt? I think the Magnum is 7 ribs. If so, your crankshaft and power steering pulleys would likely need to change as well.

The 91 Dakota is already an oddball, but look at the alternator bracket on that one without AC. Wow. Never seen that one before.