I need to take a big block 727 to a trans. shop to get it beefed up for an approx. 600 hp stroker motor I am building. I am using a 727 from a 1973 C-body as the core. I would appreciate any information on what to ask or expect the trans. shop to do in building the trans. for my application as I know next to nothing about building a transmission or transmission internals. Thanks in advance.