Yes the diffs will be ok but you will want heavier weights in them and you will want to change your spur gear out along with making sure you have the hardend ring gears front and rear. Do yourself a favor and go check out Motionmachine999's posts in the other forum and check out his web site......he makes a great roll cage also! The info I have been giving is just what I have picked up from reading his posts.
http://perfplusparts.netfirms.com/
This is his website.