what company are you looking at for the MII set up? weld in, bolt in? any options you thinking of going with? show quality or daily driver?
figure out what you want in the end and order the right stuff in the first go around. big power means big brakes. ask about tubing wall thickness, ball joint brand etc. sometimes the lower priced units get you in the door but then you end up spending more later when you upgrade.
there are some nice bolt in units available now.
scott's has some nice stuff and also give the specs of the materials used. not endorsing them, just saying check around and compare apples to apples. some have adjustable control arms, which are nice but, they have to be disassembled for adjustment I think. more time at the alignment shop so spendier too.
http://www.scottshotrods.com/online-catalog/
on the p/s pump, has anybody ever adapted a ford pump to fit the chevy bracket? no pressure or flow issues then, correct? gotta be somebody on here that's done that or seen it someplace. adapt the pump and get the pulley diameter right, should be good to go.