I've got a 390cu 2bbl from a 1968 f100. Whats the difference between
6391cc vs 6392cc?

 

1 cc ......LOL, sorry I have no idea

 

Not sure I understand the purpose of your question? 390 Cubic inch engine displacement converted to cubic centimeters is 6390.9. So as Walston answered, yes the difference is 1 CC

 

Sorry for being unclear.
As i research parts,etc... for the FE390, I noticed they list options:
390 6391cc
390 6392cc

How do I which one I have? Or maybe it doesn't make that much difference....

Thanks folks

 

Makes no difference. You could have more than 1cc difference in displacement in that or any similarly sized engine just by having parts at one end or the other of the published production tolerances.

You do need to distinguish between a 390--cars and pickups, and a 391 FT motor as found in medium trucks. More than 1cc difference in the stated size, but the bore and stroke are the same. Many other details are different.

Where are you finding reference to a 1cc difference?

 

I'll post the difference options as I come across them in the future.

Thanks

 

I would think the difference is just whoever did the conversion to cubic inches came up with that number. Have you found the parts different?

D