Scott.. 396 is small block... at least the one I am probably getting... and I think the 350 exhausts bolts right up...
425 hp and 415 ft·lbs torque... stock - roughly..one of my favorite GM motors..
Brazing might just be the way to go excellent and inexpensive solution! what kind of metal do you think? bronze? and what temp... wonder if it will work with home torch...