i am in the process of putting headers on my 82 k10, 355?, th350 and i found the old power steering brace bracket would not work with the headers.  what are my options for this bracket?  i pulled the bracket off my 73, and it utilizes different mounting holes and configuration.  (the 82 is more of an upside down U mounted on the front 2 manifold bolts,  and the 73 comes off the front of the head) and think i can fab up a mount, just want to make sure that this is needed.
also,  while i was at it, i cleaned up the drivers side block, and found some numbers.   i was wondering if anyone could help me id the block with these numbers, whether it is a 305, or 350.  
GM 3970010
thanks