rear main seal is likely shot. drop the torque converter/ flywheel cover, if it has oil in it, likely the rear main seal is bad
Might also consider that this being a new engine did you put a short bolt in the front mounting hole just infront of where the fuel pump mounts...? Its a full through hole that allows you to put a long threaded bolt in to hold the fuel pump rod in place when R&R`ing the mechanical fuel pump... If you dont put a short threaded bolt in this hole then anything over about 3k rpm it will push oil out and down the right side of the engine... Also there is another mount hole right above it but no need to plug it... :thumbup:I've also noticed that it only seems to be affecting the passenger side.The oil drips on the headers causing smoke.