Originally Posted by ghost68

A-Arms all the way around
New front rear and rear-center CVDs
Wheel Hexes
Radio Tray
Chassis
Rear Chassis Brace
Brakes
I believe they use different shock towers as well.
Possibly Rear Shocks


I would suggest you grab everything from ebay. If you are thinking of doing this via a hobby shop you are way better off selling the 1.0 and picking up a used 2.0 race roller.

A couple pointers to think about

The RTR Shock towers are fine and tough as nails. One step better would be the V2 rear tower which will give you a noticeable difference in handling vs the race roller front tower is just for looks. You could probably get both RTR towers for under $15 vs the Race Roller towers are $30-40 each
The RTR Chassis is also just fine and can be had for ~$20 vs $100 for the "Flex Tuned Chassis" there is a noticeable difference but its not like night and day.
The CVD's can be had for super cheap on ebay. I picked up a full set F/C/R for $60 not too long ago on ebay vs $150 at the lhs
A-Arms are also super cheap on ebay figure $6-10 a set vs $20 at a lhs