My car wont rev up past 4000rpm
 

hey guys
just did a auto to manual conv. and after we started up the car wont rev higher than 4000rpms. it idles smooth.
could it be a vac leak ? what do you think?

What else did you do? Anything along the lines of altering the throttle body thrmowax rod area? It sounds like this is wired all the way open, or that your linkage cable is messed up/being blocked by something.