Is anyone out there running a 4160? If so, what vacuum lines go where? I've had my 84 Blazer for about a year and it's never gotten more than 9.5 mpg. I'm guessing this may be due to the vacuum lines not looking anything like the sticker, but I don't know since the sticker is for a Q-Jet. Horsepower is great and vacuum is about 22 lbs. Also, 3.42 rear with 32" Tires, K&N, Accel Wires, etc. Also, if you live in Texas and you owe me a spare tire carrier, how about a little honesty. Trading parts on this board sucks if we don't show some integrity.