Buick Nailhead Question

[48silverstreak]

I have a Buick nailhead that came out of a 57 Buick Century but its believed to not be the original engine in the car.
I need help in finding out if its a 364 or a 401. The casting # on the heads are 1172889. Are there any other tell tale signs of which this engine might be?
Thanks in advance for the help.
Rob

[Mike Paul]

59-60 364/401

Need the casting # from in front of the valley cover to be sure which one it is.
suffix should be like
3F =1959 364 or

4F =1959 401 or

3G =1960 364 or

4G =1960 401

http://img51.photobucket.com/albums/v157/MP31A/id_nailhead.jpg

[suedesled]

The 57 364 had a cast iron timing cover and all 401's had an aluminum cover. This will be a clue but 364's after 58 had aluminum covers as well but it could be quick answer for you. Good Luck