A couple questions on a rear tank install on 72 fleetside lwb

[Jerblazer72]

Guys, a little help if possible. I am doing a blazer tank install on my 72 gmc lwb and just want to be sure of a couple things before I take the cutting tools to the underside of my truck. In the picture I have 2 arrows. The top points to what is the bottom support of the bed, I think it has to be removed. Am I correct? Also, the bottom arrow points to what I think is the spare tire mounting bracket. I think it has to come out also. Can someone confirm that I am on the right track here?

I am planning on doing the rear marker light install once the tank is installed. Thanks in advance for your comments and insight!