Trying to finally get my first Muscle Car - I’m nervous

Do not walk... RUN away from that Demon.
My quick story will explain a lot. I paid $7500 for my 1972 Duster because in my “point system” as stated in earlier posts allowed that one to hit almost all the marks.
Wanted: run and drive 1970-72 Duster/Demon with 340/727/8.75 and in green.
Bought: Running and driving 1972 Duster with 340/727/8.75 in green.
So for $7500 it checked all the boxes right... yes... but only because I was willing to put some time and money, and elbow grease into it because it was a collage of cars.
Was slant 6 original car that was drivetrain swapped and had a dash fire last year. So on to the closing statements. I quit counting how much dollars in parts I bought after passing original purchase price... and I have barely just begun on the rework process of everything. Rebuild entire rear axle, redo all brakes including upgrade to power disc, new suspension, new wiring, new interior, new wheels and tires, and fixing everything that was touched before me that is wrong. $20,000 would have gotten me ready to go pretty good, but without my own personal touch... of starting with a pig in a poke lol.