I want to find out what places make the right equipment to upgrade my block so I don't blow it apart when I put a turbo on it and find out how much power can be gotten out of a 4.0 and still have it be dependable.

 

350-400 rwhp.. anything over that and you will be pushing the darkside.

The block on our cars is plenty strong enough, it is the internals you need to worry about. Blowby Racing and Supersix motorsports? (I think that was right) sell cams/heads etc for our 6's.

 

+1

just to add: if you're planning on pushing anything over 270hp on the sixxer, i would suggest an upgraded driveshaft and a 8.8 takeoff rearend for the extra "peace of mind". plus, being able to actually do a burn out with not just your back right wheel would be nice :P