Did you built it? I guess not. Take it back to who did and ask them to look at it. Sounds like a lifter is ticking and it has some other issues. The smoking out 1 side is not a good sign.

Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451