I have an 89 suburban (throttle-body/fuel injection) 350 small block. I had the valves and head gaskets replaced about a month ago. A few days ago I noticed a "tick" coming from the motor. I went back to the shop that did it but on my way I noticed id accelerate a little hard and I would let of the gas and a puff of blue oil burnt smoke is coming out of the exhaust. long story short he said it was a bad lifter and would cost more to fix that than get a new motor. I noticed the tick getting slightly louder and now it seems as the truck is burning white and blue when I takeoff normally. and kinda fades to a faint blue then dissipates after 20mph. Is the motor on its way out? I dont know the mileage on it. Im going to guess around 150-160k I dont know when the original owner had it "re-built". But the majority of the blue smoke is whenever i let off the gas only after accelerating rapidly not flooring it but about half way down to 35-40. any help would be great. Thanks.