rear suspension question

[Leadfoot Lambert]

As you can see from the picture below I have just completed my front suspension drop. The rear is next, I plan on using the Jeep TJ springs. My question is will I need to flip the front mounts for the trailing arms to keep the pinion angle in check or will it be okay the way it is? I'm going to have the trailing arms out to replace the bushings while I'm there so it won't be a ton of extra work to flip the brackets. also will I need to install a frame notch at that level of drop? Thanks for any input guys!