1976 Mazda Rx5 Cosmo

This Cosmo had been rescued and modified by the previous owner to be used as a drift car. He repaired any rust (not much overall), installed a 13b with a 4 speed (trans tunnel has been modified to accomidate the swap from automatic), welded the rear differental, and installed a plastic fuel cell and external pump in trunk. I was able to run the car at a few autocross events until it started loosing power and would not drive any longer. I am not sure what the issue is and have parked it for the last 2 years. I have a few extra parts I will include with the car. Those are the front right fender, lower air dam, front bumper, front grill, stock steelie wheels.
If you have any questions, I will answer quickly. Thanks for looking!