Hi,
I didn't look at the links posted but,You definately have a 302 block. Ford phased out the 289's in 68 and started with a recast small block the 302 hence the C8OE Which stands for 1968. For the record it is possible that your engine has some Hipo pieces on it as alot of parts interchange between the 302 and 289? I am very well versed with the Hipo "K" Code Shelby stuff so if you are looking to invetigate your engine further carb,distributor,etc,let me know.Is the engine all apart? I'd be curious as to what the head casting numbers are and also if there are any number on the main caps.