If your cylinder is stock, that is with out any port work done, than you will want to run 35cc domes. You can get this info from ADARacing.com
As far a time it takes to put it on; If you get a head with a Girdle kit it shouldn't take you more than 2 hours even for your first time. If you are running a non-girdle head an easy 1 hour. After your first time you can do it quicker. Don't get in a hurry, take your time keep things clean, keep all dirt as much as possible out of your cylinders, torque the head slowly. by this I mean come up on full torque easy by starting at say 15ft lbs then 18ft lbs then 20 and so on till you reach the final correct tourqe on the bolts/fasteners. Then when your done Go over them one more time at full correct torque and re-check.
I always like to put about 30-45mins of ride time on it get it up to operating temp and then re check all the bolt agian.
Also wanted to add; follow the torque sequence as is labeled on top of your stock head. The bolts have numbers beside them in relevance to the sequence to be tightned. Here I will give you a pic to look at. The outer Numbers are girdle bolts the inner are around the cylinders them self.