Revo questions???

[Jammin57]

I am new to electric and brushless and wanting to kinda get into it.
I have a 3.3 revo chassis laying around with all the tekno hop up's on it
(not the electric stuff) it needs a few small parts to get running again and was wondering if its better to put a conversion on it or sell it and get a
e-revo and turn it to brushless???

Also I have a mamba max from a rock crawler and from what I have read on here most of the revo's run on a mm,9xl, and 4s lipo and was kinda looking at running the same because I dont want to spend the money for another esc and dont want to spend over $200 for my first motor is it better to run the whole tekno brushless conversion with the clutch or use the rcm motor mount for the revo???

Any info would be alot of help I am new to this so if something like this was asked already I apologize in advanced. Thanks