I hope you have checked for valve-piston clearance before installing the new cam. What kind of smoke comes out of the dipstick tube? Is it from coolant or is oil mist? Your problem could be also leaking gasket.
For the noise from the bottom end, it sounds like crankshaft bearing.
Check also the appearance of the spark plug electrodes on the LH cylinder head. That could tell you a lot.
For the noise from the bottom end, it sounds like crankshaft bearing.
Check also the appearance of the spark plug electrodes on the LH cylinder head. That could tell you a lot.