3 thoughts would bug me. 1) If I were setting up a Firebird to race, I probably would not use a Pontiac 350 motor. Or does he mean a SBC? 2) The ad says 510 hp which would be a level for a healthy 455 let along a 350 Pontiac. 3) If he set it up for racing, did he actually race it and did he bend anything?
Both the interior and exterior look good.
Take a good look at the pics. I was fairly kind calling out the blemishes in the earlier post. Regarding the 350 motor, he says its a 400 car and a 400 engine. I did not verify what it was engine wise.