blue smoke on acceleration , dramatic increase

THE MYSTERY IS SOLVED!
Head gasket ! blew the fire ring in towards the intake manifold exposing it to the crankcase , presumably sucking oil into the cylinder and out the exhaust. This has turned out to be an interesting thread to read as many conclusions were drawn from assumptions. To set the record straight. this engine was purchased from Blueprint in 2011. was base model with iron heads. had an incident in 2016 with ring gap/land failure. Blueprint sold me new pistons ( 8) and rings at a reduced rate . interestingly the rings had been pre gapped and installed on the pistons. i checked the ring gaps and they were @ 30 thou. (top). i increased to 32 thou. ( remember the KB recommend was, and still is 26). one cyl was always 15% lower than the rest as a result of a small divot in the cyl wall as a result of the previous piston failure. occasional puff of smoke was noted from time to time. Disappointing, but not to serious as this 67 Barracuda was laying down 12.58 's wth 3:55 gears and 904 w/ stock torque converter. thanks to all who made helpful suggestions. by the way, honing cylinders with main caps , and head bolts torqued to spec is the next best thing to having torque plates for every engine you build. ( need to have washers under head bolts to simulate head ).