Maybe the saddest M-Code Cuda you will ever come across

Buy the 38000 race car sell the race stuff off might be able to sell the stuff off to offset the build and have nothing in the car problem solve
Just ask around for someone to give you some for free. There are many people giving away perfectly good 7 1/4 rear ends on this site as well as www.slantsix.org. I'm sure you'll find at least one with large bolt pattern.