I picked up a set of these carbs for $300 and plan to install them this winter. wondering if anyone here has a set, and what kind of power to expect from low-mid-high rpm. the motor is otherwise stock, the only other mod I may make is some head/valve work. I hear these carbs are some tricky suckas to tune, i.e.-using bosch o2 sensor connected to a multimeter to fine tune the mixture. any input would be great.