Need a little more power from it. It's my Dad's truck and it's a 1993 International. He doesn't want much, just enough to make 5th gear not seem so tall. It's a stack retriever that started life as a Ryder truck. Bottom end was rebuilt about 7500 miles ago. Any help would be appreciated. Thanks.
p. s. It has a Bosch fuel injection system on it.
p. s. It has a Bosch fuel injection system on it.