FWIW, Based on many examples of engine stampings I have on file I would say that is not an original stamping. The T0607 may be correct but the rest appears to have been added. the JD is the incorrect font size and should be similar to the complete engine assembly date. The vin is an incomplete CONVIN, not likely stamped at the factory that way and as mentioned before the body was assembled in Jan 1969 (01B from trim tag) and the engine assembled in June 1969, not likely they would have held the body that long. additionally the atlanta plant did not report VINs for May and June if I remember right, sorry at work right now and don't have my list with me. hope this helps Andy