little background first. vehicle has been non op and off the streets for about 4 years. the person i got it from started restoring the truck but had too many projects to complete. he said that the exh manifold was cracked when he got it so he pulled both manifolds off and replaced them with a set from a 74 or so vehicle. he took the head off to have one of the manifold bolts taken out that had broke off inside. he told me that the cylinders looked good with no pitts or scarring. he also said that he rebuilt the carb. however since doing this work the vehicle has started smoking and he really didn't know why. now that i have it, ive changed oil to a 15-40 put in new valve stem seals on the intakes (the ones i took out seemed to be in good shape still plyable and soft. ive did a compression test and got 90 + or - 2 across the board. i pressure tested the radiator and it doesn't leak at all. the engine runs very good no noise, smooth idle, doesn't smoke alot at idle only seems to start really smoking steady if i raise the rpm. at about 2000 rpm blue gray/ white gray is spewing steady. any suggestions on where to go next would be greatly appreciated. thanks for the time. eric. 64 D100, 65 Dart GT, 66 Dart Ute Custom. all /6 engines.