Hey Deke, just wanted to say that your car is absolutely hands down the best looking Gen5 Camaro I have seen to date! Simple yet menacing!
I am currently putting all of the ZL1 body parts on my 2013 AGM 2SS....your car sent me over the top.
As for your stereo mods I am running an HD900/5 in mine with a 12w6. it sounds amazing. If you went with a 12w3 on that xd700/5 im sure it would be a great setup.....just my .02 cents. Good luck on your rest-modded 73 sounds like a fun project....but dont leave DekeII out...hahahaha