i have a jx 21 ninja engine wit a big block traxxas engine kit couldnt use it on my revo with that kit could anybody please tell me what kit i need and will this work and also how are those 21 cobra engines i think i have the 198r verision by axe rossi

If you ask this question in an informational thread, I'm sure you'll get the answer you're looking for. However, this is a buy/sell/trade thread, so unless you're selling the motor here, you posted in the wrong place.

the traxxas kit should work....although you might have to grind down the motor mount braces so the engine will fit.


like this...

I used a american cnc big block kit on mine, I fit a modded surefire.32 in it, Check out the pic

WOW, I just saw that your talking about a revo, My bad