Looked at a 69? Firebird today and it looks like its the original engine and four speed trans. Here is the VIN and firewall plate.
223379U111371 -- VIN
69 22337 LOR514932 BDY
200 87-67 PNT
11 - A
The body is solid but the paint is dead, and the seats look good but the headliner is falling, and the carpet has been replaced with in the last few years from the look of it. It has a MSD ignition and MSD 6AL controler box and coil. The car is dark blue with a medium blue interrior and looks like it would make a good driver.