Assuming you don't wreak your union bolt and union pipe, you will only have to replace the gasket washers part # 90430-22008.... If you are using silicon you might even be able to reuse them, but for the cost and potential effort saved it makes sense to replace them while you can.
Thanks for the props Bill, I just hope this helps someone out. It took me a long time to decide that I was gonna attack this with the head on engine in car, but rather than make some elaborate tool I decided to go with this socket hack.... Just one more custom toyota SST I guess
