machine shops?????????

need a good list of machine shops for my head and block.
also if i want to boost past 25lbs any helpful hints or something i should refrain from doing...
i have a 92 b18a1 with a cable tranny.

your going to need to sleeve your block before you do anything. any import car magizene will have ads for companies that sell sleeves, and/or ready to run blocks. for the level of boos your talking about running, you will also want head and main studs, and it would be good insurence to use an o-ring head gasket.