1978 chevy nova base/LT1 corvette fuel injected v/8 engine under hood RUNS GREAT

This is a project car I acquired in a trade for a pickup I had. It has a fuel injected corvette engine I am told under the hood. Most all interior panels and trim are missing. Seats are torn but repairable. Driver side door will not open. It has a slight ding on the left rear quarter panel. The windshield trim is also missing as well as the headlight trim. It has an automatic transmission but it is slipping in DRIVE all other selections are ok. The fluid is dirty a filter change might help? The car is sold AS IS Where Is!!!!! Buyer to arranger pickup!! It does run great and will start right up and will move.