Pacer on mine (54 PU), cheap out of a boneyard--original rack leaked, replacement has been fine for the five years it's been on there, you just have to take care of it. Steering, suspension and brake parts are cheap and readily available. Secret to good handling with the Wayne's World front end is appropriate springs. Good suppliers will sort this out for you. But everyone I've spoken to with the MII setup is happy with that too, particularly the lucky ones who can afford the setups from TCI, Progressive etc.
Also depends on whether you want to cut the frame off. MII you have to (I think--others will correct me if I'm wrong), Pacer you don't. Makes for an easier fix. Also I kind of liked keeping my frame in one original piece. And my dosh in my pocket. Most of the fancy MII setups cost blood.
Christian