i have a 68 mustang i am trying to decode what type of block i have C90E-6015-C
one site said 351 and one said 302 can you tell me where i can get the answer to this,or if anyone one else has a block like this?

 

I think the C9OE-C is a 302, while the C9OE-B is a 351. Easier than checking the number is to look at it. On the custom engine below, you can see where the deck, where the heads attach, is 1" above the timing cover. On 302 (and 289) the deck is even with the timing cover.

 

thanks for information i think i might have the orignal motor and tranny