sounds to me like fried rings...you are getting crank case pressure released through your valve cover, which means air/smoke is getting past your cylinder walls. could be a hole burnt in a piston too.

are you sure that the head was torqued correctly. was it a reputable machine shop that did your head. did they also machine the block? the head gasket could be blown again as well.

the reason for the rough idle is because of little to 0 compression in one or more of your cylinders. you need to do a compression test to find out which one/ones.

let me know if you have any more ?'s