What car. If there is room for a 1/4 scale servo go that route. If not check out hobby city's servos- very economical
http://hobbycity.com/hobbycity/store.../_.17sec_/_49g
equates to 180oz/in of tq.
plenty for your truck
Benjamin White
R/c Monster Team Driver
Jq the car, LST, Sportweks turmoil pro
Unconventional Techniques, Superior Results