Aluminum Shock towers, FLM or UE (unlimited engineering) knucklehead towers. I prefer the K-head towers but flm towers do well also and have a good replacement policy.
I prefer not to use RPM towers as they flex too much (personal choice). You probably couldn’t bend a K-head tower if you tried, if you did you would have more to repair than the tower.
You will also want new hinge pins for aluminum bulks (e-clip style if you didn’t know) or you will have to install the lower pins backwards into the arms during assembly which makes it a pita when the need removed.
Good aluminum chassis braces are a +, New Era has a good set for the extended chassis you have.
Rule of thumb with a TMaxx: Aluminum down the center, plastic on the corners.
I agree with everything. ^ You can't go wrong with those recommendations.
If you can find them, there's a company called Vertigo that used to make some nice chassis braces.