60k is a load for a recreation. IMO
90k is high for a nom v code cuda except that the car is black. Being coded tx9 makes a big difference in the market right now. Is there a buildsheet available with the car?
I saw a real deal auto, v code 70 cuda in tx9, with numbers and documentation at the RS auction in Phoenix. The bidding died on it at 85,000 or so. The reserve had been six figures plus, but the cars just aren't bringing the money right now.
You should be able to buy either car for less. I'd say buy at 45,000 and buy at 75-85. Just matters how bad you want it. You have been shopping for a long time right?