I've owned classic cars before. Always wanted a 77-78 but can't find them or the price is high. I found a southern state rust free 80 TA. Owner says it was a special order car and got a Pontiac 400 engine vs a 305. Is that possible? I look at this car soon. What other problems should I look for. Guy is calling the car in excellent condition, fully documented for like $10K. Thanks for your help.