[SCOTI]

Less weight? Maybe.... but 400lbs???

Easier accessibility? The oil filter accessibility is uneffected by the front suspension, the fuel filter may or may not be affected.

Parts availability? Both are equally available. Would be easier to get a rack than a new steering box @ local parts places.

No header clearance probs? Maybe... maybe not. Chances are your current headers won't clear the new location of the MII rack outlet that the column must attach to. So.... possibly no interference, w/headers built for use w/a MII front suspension.... but you have to pay extra for the new headers (could sell old ones & offset the price). Manifolds on either prob would work w/o issues.

Great handling? Define 'Great'? 60's trucks have never been a threat on road courses & neither have pintos. Now, the MII handles better than the 30+yr old OEM stuff.... sure, but so does a fresh rebuild w/updated truck parts +sway bars.

Alignments? A wash. The edge possibly going to the MII since the bolts are on top of the a-arm attaching plate & easier to access. It's also easier to knock the MII out of alignment vs. the GM set-up.

Better brakes? Stock vs. stock (apples to apples) comparison, I don't think so. Both DISC set-ups come w/single piston calipers. The MII comes stock w/a 10.25" rotor & the truck has 12" rotors. Now if comparing to drums... yes the MII is better. But.... both can have bigger/better aftermarket brake systems adapted.

Initial cost? Although neither is cheap, MII's do cost more than completely rebuilding/upgrading the stock GM stuff.

Ford parts on a Chevy? Most people accept the 9" w/o issue. Good parts are good parts..... irregardless of manufacturer. If it works for you is good enough reason to use it.

Must be welded? Fatmans also makes a bolt-in crossmember for Chevy trucks.

As stated previously.... No offense intended. Just more info for informed decision making.