all depends on what you want done & by whom.
The work will need to be of very high quality due to the nature of the anifold shape. and many areas are very hard to read. There are several techniques you can use, some expensive, some less so, some with benefits larger than the other etc etc.
Find out exactly how they will do it, and then dont pay until its done. Then take a varnier caliper to measure, and check each port to make sure they are identicle.
Manifolds are hard to do well....take cars in choosing.