[Sportyworty]

The motor has 68 Valve Covers and Oil Fill Cap so that would make it a 302 if original to the block. The block cast number is located on the passenger side rear close to the starter. If it is cast C8OE 6015 A or B it will be a 302. You will find the cast date just under the part number casting. If cast C4 C5 or C6 it will be a 289. You may not be able to see these numbers as they are behind the starter motor. If you pop a Valve Cover you will see a cast 289 or 302 and the date as well.