I have a running '92 350 that came out of a Tahoe.  I am putting this in my 39 Olds and I need a nice sound with backup.  I dont have to worry about any kind of smog equipment.  So to tell you a little about it I already bought the Edelbrock performer intake to swap it over to a carb, and I have a 750 double pumper.  I have a 700r4 tranny with a 2500 stall, and my gear ration is 3:73.  What is the best cam and size to go with and is it worth getting the heads worked on and if so what should be done, and how much should I expect to pay? I would like to have around 400 HP if it is possible I dont know what the stock 350 came with.  Thanks in advance for the help!!!