c20 suspension recap?

[1968robinsegg]

hello everybody another newbie here, found this site the other day and have been reading ever since! awesome site-so much information its unbelieveable and everyone seems so happy to help! its very appreciated!!

my question is this- i just got a 1968 c20 with rear leafs, 8 lug, manual steering and brakes.

from what i gather and excuse me if this incorrect- the front suspension from a 73-87 1/2 ton chev or gmc truck/van will bolt in place to get 5 lug bolt pattern,front disc power brakes? also i can use the booster and master and the p/s parts?

the rear diff will be wider by about a inch and a half and will need new perches welded on with a 2 or 3 degree down pinion angle?

last ?? i was thinking of using the 5" lowering leafs from early classics, has anyone used these? good or bad??

thanks for the help!!!