If you can find a JDM B20A from a 86-89 Accord or 86-87 Prelude, it will bolt in fine and has about 160hp (the 88-91 Prelude B20A's are different, they tilt backwards, and won't bolt in). These motors are somewhat rare since they're so old now, but if you find one, it should cost around 300-600 for the motor.