Originally Posted by qstorm777

The kit wheel hexes are steel. Some people have tighten the set screw too much breaking the hexes. I would initially stick with the kit wheel hexes.

I would definitely upgrade to aluminum a block.

Those are the aluminum diff pins. Some people have broken the plastic diff pins. That's why I recommended the alum diff pins. I never ran the plastic diff pins - I went straight to the aluminum.

The delrin inserts are smoother than the stock shock inserts. It's not a must. It does improve performance though.