I have no experience with them but I have seen San Diego Rod and Customs put out some sick stuff so I'm sure that a simple engine swap, especially one like this which has been done for several years, will be within their capabilities. If not there are almost 130 custom shops in just the San Diego area alone.
Just food for thought, I don't have a garage but stil do everything in the street or in a carport and a 6.0l swap is next on the list for the up coming year. God luck