I bought a Chevy 350 , Block casting # 3970010 on rear pad, with Identification # V0408TDR - C8F438333 on the Front right pad. I actually helped pull this engine myself out of a 1976 Corvette, but, the owner could not asure me that it was it's original engine. Would gratefully appriciate identifing these numbers, or directing me to a place for same purpose. Thanks

I have tried to use the internet before to find out what TDR stands for without any success, I DO NOT HAVE A VIN NUMBER, therefore, what I was directed to , I have already read and found by myself. I do understand that with the VIN number I could find the info. myself. I DO NOT have such a number. I know all about the casting # 3970010 and the V0408 , it's the TDR that follows it, and C8F438333 stamped below it that I'm trying to find info. on. Thanks I have tried to use the internet before to find out what TDR stands for without any success, I DO NOT HAVE A VIN NUMBER, therefore, what I was directed to , I have already read and found by myself. I do understand that with the VIN number I could find the info. myself. I DO NOT have such a number. I know all about the casting # 3970010 and the V0408 , it's the TDR that follows it, and C8F438333 stamped below it that I'm trying to find info. on. Thanks