does anyone know if there is a service to get names of previous owners?? Illinois dmv says they can only search the titled owner and can not give out any further info. I have a 65 gs 4 speed hardtop ive traced back to the 80,s, i was told that this guy bought it from the orignal owners son. Ive been told that the motor is original and all other numbers are matching, frame, body, trans, which i have verified except for the motor which has no info at all in front of the valley pan where it should be, and no evidence of grinding or sanding is evident. Is this a factory replacement block or??? This car was produced the first week of may which to my knowledge is when they first produced the 65 gs. Think they forgot to stamp it?? Ive been restoring cars since the 80's and own a restoration shop. I know other manufacturers replacement blocks have no stampings, however this is my first buick, and the first time I ran into this scienario. The car shows 63,000 miles which ive been told is accurate and i believe by the overall condition of the entire car, body, pedals, ect.. Any help out there??? Thanks, Mike