I have a car I bought and I'm trying to find out what heads are on it. It's a 350 SBC, I can't figure out how to upload pictures to show the front casting symbol, but I do have all the casting numbers.

GM 45

3991482

E201

I looked up in my "Chevrolet by the numbers" casting number book and I cannot find this head in the book. Can somebody help??

 

from what i can with a quick yahoo search look's buy the casting number they are angle plug earl to mid 70's 2.02 head's

 

Look at the number a little closer, make sure that 8 isn't really a 9. That would help to explain why you can't find a non existent casting number.