First I would like to say you can build it into a 383 cu. in. for the same money. A real week-end runner and very durable. But!!!
When the shop gets through boring and line honing they will need to set the deck height. This means they will assemble the four corner rods and pistons to check the deck to top of piston. If it has not been rebuilt before it will be .020 to .025. You should set the deck height at .005 in the hole so when you torque your head and gasket your squish will be around .040 to .045 assuming you are going to use a gasket that is .039 thick. These measurements are very critical to reduce the chance of detonation. As you know detonation will destroy a high performance engine. Then have the heads checked and repaired if necessary and put it together double checking all the clearences. If the shop is going to assemble it for you tell them what you want or take it to a performance shop to have the work done. I hope this helps and good luck.