This is off topic slightly, Off roading or climbing steep hills with a Q-jet on my 79 short box lifted 4X4 chevy ( 400 sbc) and the engine would die 3/4 ths the way up the hill. Put a Holley 650 on and problem cured. Been a Holley guy ever since---Are they perfect? no, in fact the Q-jet had less maintenance in a daily driver. But Holleys are so easy to work with that its worth it to me to run Holley.. Currently a 750 Holley on my 406 in the 78 Trans Am .