I am trying to sell a 1971 455 and trans. A guy asked me about casting numbers on the block and heads. Where exactly would I find those? I believe what he is looking for may be behind some brackets, but I'm not sure. I can't believe selling an engine is so much hard work. I am not sure why he would need casting numbers, it won't be a numbers matching car, because I saw the car go into the shredder.

 

Hi Steve
Read through this thread and see if it answers the questions he has. John

https://classicoldsmobile.com/forums...s-engines.html

 

He wants casting numbers because more than one uneducated seller has advertises an Olds motor as a 455 when, in fact, it was a 350. He wants casting numbers because some Olds heads are worth $50 and some are worth $5000. As a seller, it's in YOUR best interest to know what you have and what it's worth. Alternately, price the motor low enough and tell him it's pot luck.

 

https://classicoldsmobile.com/forums...nvertable.html
I'm fairly new also and had this same question, read the above post, several members gave me some good info. I'm still have trouble finding the derivitive number, but W/Z manifolds, G heads all check out on mine.
Frank

 

Would the locations for a 455 be the same as these pics or " almost " the same location?

 

Yes.