where could i possible find an aftermarket ecu that would be decently cheap or where could i send mine to have it reprogrammed for more horsepower and better performance?
 
LN4?? Do you mean the 2.2 OHV (LN2) ?
What year is your car
 
 
Your best bet is to buy HPtuners 
here. A "better" tune still wont be the best for YOUR car. A good tune is specific to each car and the supporting mods it has.

"In Oldskool we trust"
 
LN4  = 97-99 7.1 litre 6 cyl turbo diesel 
Edited 1 time(s). Last edited Tuesday, June 15, 2010 11:03 AM
 
 
sorry. i some reason put vin "4" in place of the "2", buy yes it is the 2.2 OHV engine
 
Depends on the year, which you didn't list (not even in your profile).
Also, we have a "tuning" forum for this reason...
 fortune cookie say: better a delay than a disaster
fortune cookie say: better a delay than a disaster