Will it still kill my drive train if I use the 2.5 because I use 6 MIP shiny CVD's.
no, mip's are fine with the 2.5, matter of fact you shouldnt even have a problem sticking with the stock slyders.
I want my T-maxx 2.5 with stock engine and all CVD's to use a center 1/8 scale type diff (maybe even a front biased one) this is for racing on a track. Is it possible?
this I'm not sure of. 1/8 scale is typically big block.
what i do know, you can not run different diffs in the t maxx, you can not run a 1/8 scale diff in the front and stock in the rear, the gearing will not allow it. you will destroy the rear diff before you know it. you would be better off useing the stock diffs f/r.
to be honest with you, if your so set on running 1/8 scale drive train, you might as well just get a truck that is already set up to run it, like a dominator or a monster pirate.
jim