I am getting ready to get my 69 Firebird out of storage. first order of business is to pull the 350 and rebuild it. I am thinking of changing the turbo 350 to a 200 r4 for the 4th gear. Does any one have a good source of information on this swap. I have alot of questions like; What year transmission do I need to find? Is there a crosmember modification? Do I need to change out driveshaft yokes? Is there a need for an some electrical upgrade? Any help would be great.