If i want to set up the Ken Block as a full time drifter do i lock front and rear diffs or just the rear? Or not required at all, save the lockers for the summit?

I used 125k wt in the rear diff and it did alright. If you need any RPM arms or brand new drift accessories, wheels and plastic tires, I can sell you what I have left over if you are interested. Everything but the arms are brand new.

You'd onestly be better off buying a 1/18 scale drift car you end up dumping a lot of money into the traxxas 1/16 chassis its better to just buy something like a M18 Or A 18R
IMO

use silly putty...doesnt break down, wont leak out and pretty much locks it up but not completely (95%). seems weird but works perfectly

the traxxas 1/16 chassis is about as small as i would like to work on, certainly has its shortfalls compared to the 2 mentioned as far as CG and such but i can work on them, and i already have the car. so no need to purchase anything new.

rear diff only?

yes

Yes lock the rear diff throw some tires on it and have fun

Just about bought an 18R today while i was picking up the diff lockers for the Ken Block. Alot cheaper than i was expecting to see.

They're going cheap now no one likes 18th onroad anymore expect to see an 18R2 soon with the belt drive system ugh. Or expect the 18R to be dropped all well have is the M18