d333 cat engine

Hi Im looking for a top end gasket set for a D333 engine with serial number57H310 that is in a 1968 966b payloader or Traxcavator  as what is on the tag thankyou for any tips of where to find

My literature shows the 75A (US) to be equivalent to your 57H (Ca) and uses a 2S8271 valve grind gasket group (no water pump gaskets).
Plug the part number into ebay.
In 1968 Cat started introducing the D333c (4-3/4" bore) Is yours the 4-1/2" bore or 4-3/4" bore?

Thankyou Old Magnet it turns out the whole engine is not worth fixing the head has 4 or 5 cracks in it one liner is loose on the bottom end to. So now im asking does someone know of a d333 or a 3306 running cat engine what I have found out so far the3306 will bolt up the same as the d333